AR-15 - How To Line Up A Gas Block

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Everyone asks where I find AR-15 stuff in stock or where I order from, so here you are: bit.ly/2trc7Kg
This is how I install my low profile gas blocks. It is a quick and easy trick to do but it has not failed me yet.
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1 окт 2024

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Комментарии : 223

@VibingCat39 7 лет назад

I always blow compressed air down inside the gas tube and adjust the gas block until I feel air coming out of the barrel then I tighten the s**t out of the set screws.

@williampowell8083 4 года назад

man that is good advice.

@VisceralHamster 3 года назад

Damn good advice, thanks.

@Willoajsjs 3 года назад

Wow that’s a great idea

@juniyananajukyu 3 года назад

Put one of those long cleaning q tips in the gas tube in the receiver, then with your thumb cover the chamber, blow compressed air and if the qtip flies out, you’re good to go.

@christinaabundiz1888 3 года назад

@@juniyananajukyu dude does this help alot

@batex858 10 лет назад

Just want to say I LOVE how concise and to the point your videos are!! Way to many folks take 20 minutes or more to do what should only take 5 minutes. Your video's are excellent! I'm assembling my first AR and yours are my go to source for info. Keep up the great work!

@--RSL-- 6 лет назад

Some gas blocks dont line up all the way to the wall on the barrel

@Chchchchchivo 4 года назад

RSLewis ok thanks

@nathanielradtke7590 5 лет назад

Wrap your business card around the barrel and butt it up against the ledge so it's square.

@hairydogstail 2 года назад

You should have measure the distance from the barrel journal shoulder to the gas port and the gas block port to the outside of the gas block to make sure they didn't machine the barrel journal for a hand guard cap...I do realize this video is 8 years old and your info was cutting edge for the time...

@seanmtactical6069 8 лет назад

Low profile gas blocks have the gas port in the top side that feeds the gas tube drilled into them. In order to do this during manufacture, they drill through the bottom and then into the top of the inside of the gas block. Then they thread the bottom hole and put a set screw into it. This means if you remove the set screws and before installing the gas tube, you rotate the gas block 180 degrees, you can see EXACTLY how far you should offset from the shoulder, if any. You can also set up your centers with a pair of calipers if you are super anal retentive. You also see just how much wiggle room you really have. I've found that most give you at least a +/- of 5 degrees in any direction before you get close to impeding gas flow.

@seanmtactical6069 8 лет назад

I agree. I'm just explaining how to set up offset from the shoulder if you want (sometimes it's necessary if it's a non-typical block or shoulder). It also gives one a visual way to see their tolerances too. I've found most gas blocks initially leak a little too until they get carbon and copper fouling in the gaps and then stop leaking. This is usually a mag or two of ammo before it clogs up.

@HomesteadOnThePreserve 6 лет назад

Spot on Sean. By combining the above "left/right centering" using the penciled line and your "forward / rearward centering" technique you simply cant go wrong. As an added bonus, if you have feeler gauges , you can use them to fill the distance between shoulder and gas block (at whatever distance required) so when you rotate the gas block back to its normal position the feeler gauges keep that perfect "forward / rearward" distance.

@alpalmieri8644 6 лет назад

When i watched i would have gone to my dial calipers,anyone who reloads has to be able to measure precisely.

@reganerskine248 6 лет назад

Hi Sean,this was the best advice ever!.I slipped on a low profile gas block today and rotated it and it lined up perfect hard against the shoulder.What I would like to know is that good to go? Or should I allow .330mm where the hand Guard ring was?,I’m worried the gas tube will seat to far back even though the bolt closes fine.Or do they allow for that when manufactured.Its a Winham weaporny which had the pic a tiny type gas block on it,and going by the carbon stain it wasn’t perfectly centred on the hole either.

@PrivateInfo-c9q 2 года назад

It is 2021, and I spent an hour looking for an easy way to line up a clamp on gas block. It was yours. Thank you!

@clyoul3ss819 Год назад

2023 here. Haha. I also hear of blowing through the barrel with the barrel plugged at the end. When you feel/hear the most air going through the gas port you know you're spot on! I'll be doing both methods.

@Blur125 8 лет назад

This is assuming the gas block is mil spec and should rest against the barrel collar. This is not always the case with low profile gas blocks and a gas port aligner is helpful ($10 piece of plastic - one time use unfortunately).

@88mikehurst 6 лет назад

Kevin Vellanoweth milspec will not sit against the shoulder because its ment to have that gap to make room for the delta ring

@scatcrank 4 года назад

Use a toothpick

@gixxerrick2002 7 лет назад

i purchased a gas block 2 weeks ago that had a hole drilled in the top of it...so i stuck a 1/16 allen wrench through the hole down into the barrel gas port...was idiot proof.

@theburghrules 7 лет назад

I put a piece of toothpick in to the port and cut it to flush with the barrel. Slide the block over it, Invert and let gravity pull the wood into the gas block port. When all is aligned, tighten the screws, and stake. Then run a cleaning rod down the barrel to break off the toothpick, and repeat.

@NorthSaintPaulNews 5 лет назад

You are thinking to hard and you risk getting that shit up in your tube.

@tahcogunworks 3 года назад

Except you pushed on too far as there is a small gap required as would be occupied by the front handguard plate.

@nsz85 3 года назад

That is the general rule but there are exceptions.

@hairydogstail 2 года назад

He could have measured the gas block and gas port to barrel journal shoulder to verify..

@ronbutcher9412 5 лет назад

You're assuming the hole in the gas block and the hole in the barrel are the same distance from the ridge on the barrel......not always true....just had it happen to me.

@AtomicCitizen 5 лет назад

He does but it takes 15 seconds to measure the opening in the barrel and block to double check. If they don't line up, well, now you have the maths to get it right.

@hairydogstail 2 года назад

@@AtomicCitizen He aligned them but "did no"t measure the gas block port to the end of the block and compare it to the measurement of the barrel port to the journal shoulder.If the barrel journal was cut for a hand guard cap then his ports would not be aligned..This video is 8 years old and was cutting edge info for the time...

@robertthomason5254 10 лет назад

The easy way to do this is with a piece of wire like a paper clip. Their is a video floating around on YT utilizing a plastic tool being sold for $10 that is a one time use which is crazy. Find the video and utilize the same method except with a paper clip cut to where it fits flush in the gas port. Slide the gas tube onto the barrel then flip the barrel over so the cut wire that was in the gas port falls into the hole of the gas block. Now you know for certain it is aligned. Tighten down the gas block as you normally would. Now either take a cleaning rod or a bore snake and jam the paper clip wire out of the gas port. If using a bore snake you will need to start with the paper clip wire up in the gas port and not in the barrel. Once the snake is sticking out both end of the barrel then turn the rifle back over so the paper clip wire falls back down into the barrel. It will then get hung in the bore snake and can be pulled out. Be sure you find where the tiny (now bent) wire goes and it is fully out of your gas port and barrel. I keep extra paper clips in my tool box just for this purpose. Just use the smallest diameter that fits very loose in the gas port. It should not fit tight at all and should move in and out of the gas port hole very easy.

@WeAreNotAlone69 6 лет назад

Instead of using the Gas Port Line up kit being sold by Browells, Cut down a toothpick. Cut one end, then stick it in gas port in barrel. Spin it around while it's sticking in port and it will usually leave a mark. Cut it so it's flush with barrel. NOTE: Make it a semi-tight fit so it will move via it's own weight when barrel is rotated Remove it and clean up any burs, then position barrel with port in barrel facing UP. Put modified toothpick into port in barrel. Slide Gas Block on. Rotate barrel 180 degrees so barrel port is facing downwards. Tap, vibrate barrel a bit to make toothpick fall out of bore and slide into gas block. Rotate gas block to get a average of where center is. Tighten down gas block. Rotate barrel so gas port is UP..tap, hit barrel with hand so toothepick falls into bore. From chamber end... use AR clean rod without anything screwed into it... Slide it til it hits toothpick then give if a sharp rap. This will cut toothpick. Save the piece that comes out. Do same thing again. measure parts that come out. Compare to how long it was before cleaning rod sheared it into 2 pieces. Why use a toothpick / Vs a paperclip? Toothpick is made out of wood, is easily cut. TIP #1: To be on safe side, blow compressed air thru gas tube that mates with BCG to blow out any debris out of gas block and into bore of barrel. (Backflush) Blow out bore for good measure.. TIP #2: Measure the length of modified toothpick. Reason? Running clean rod down bore will cut into 2 pieces.. You want to make sure ALL of the toothpick gets removed. So.. Measure before and after, do TIP #1 .

@crypto_pinto2660 6 лет назад

Won't that paper clip damage the inside of your Barrel I know of two other methods that don't require you spending any money that work a lot better then pushing a paperclip metal Paperclip through the inside of your Barrel

@danrozanski6130 5 лет назад

One time use, but you get a pack of multiple. It's still a simple technique, but there are other ways.

@plumpye474 7 лет назад

that is genius I'm gonna try this method whe I install my new Midwest Industries gas block & Gen 3 SS Free Float Rail

@rls303 10 лет назад

Tricks of the trade =) Thanks Nate

@nsz85 10 лет назад

You're welcome :)

@GorillasGuns 5 лет назад

Man I wish I woulda seen this yesterday, but I got it lined up by eye, cuz it's working as it should, but great tip for an easier install, will definitely use it on my next build

@ChaskeJohnson 5 лет назад

You can also remove the set screw below gas port to see where the gas block should be on the barrel wall. Most of mine sit a 1/16th of an in inch away

@Khaosriged 9 лет назад

Does there have to be a space in between the gas block and the barrel stop so the holes are lined up

@nsz85 9 лет назад

Khaosriged That depends on the gas block and the barrel. Sometimes a space is needed, other times it is not.

@reganerskine248 6 лет назад

Trying to find out the same question.How do you know if gap is needed?,my holes line up perfectly centred if the new block is hard against the shoulder so should I set it at this? Or will the gas tube be back to far and damage the gas key?,the factory fitted block was slightly forward with the hand garud cap on there as you can see the carbon dot it has left behind so should I set it at that which is about .330mm ?,understand not all gas blocks are the same but would like to know how do you know if your gas tube is at correct length? Bolt closes with not restricted either way

@williamriley2528 3 года назад

Need to concentrate more on KEEPING THE GAS BLOCK ALIGNMENT...!

@JJGuccione 2 года назад

Regarding high temperature areas - Materials such as lead pencils and wax or grease pencils which contain carbon, will cause granular embrittlement and lead to cracking, must not be used.

@130bowman 5 лет назад

Never use a pencil to mark metals subject to high temp graphite causes heat concentration and can lead to failure

@waaynneb1808 5 лет назад

I'm glad you mentioned this, I was reading-through before I was gonna post this same warning. You're correct, never use a pencil to mark anything that will encounter heat. the repeated concentration of heat at those lines can have a long-term detrimental effect.

@lexball50 7 лет назад

Great vid. I just subscribed. I love quick straight to the point tutorial videos.

@ColeDedhand 7 лет назад

Great tip. I'll be using that.

@specops56 9 лет назад

Good idea! So simple a caveman could do it.

@anujchaudhary3653 9 месяцев назад

Sir gas block ka hole size or piston ka hole size pe video upload kren

@Willoajsjs 3 года назад

Thanks for these vids man

@2002Modena360 7 лет назад

Just wanted to give you a huge thanks for your vids! I went from never having built an AR to just completed my 8th! I'm so proud of them I can't tell you! Again your vids made it all possible!!

@d3r371ct 10 лет назад

keepin' it simple! i finished by first build not too long ago (actually used a lot of the same parts in your first how-to vid). for people wondering about spacing the block, always check with the manufacturer. i used the yhm-9384, which does not require the 1/32" shoulder gap.

@davidkappelmd2537 9 лет назад

I used the YHM-9384 gas block too, but I had to space the gas block .003" to align the gas block with the barrel. Check your barrel and gas block dimensions before installation. Not all are created equal.

@ironhorse127 6 лет назад

Short n sweet. Right to the point. Very easy to understand. Thanks

@soconnoriv 7 лет назад

Might want to consider using something else instead of a graphite pencil. As someone else commented previously, graphite doesn't react well with steel in a high-temp environment.

@B22777 6 лет назад

soconnoriv what would you recommend using instead?

@soconnoriv 6 лет назад

Brandon Spears chalk or grease pen would be better. Preferably chalk

@pistol777 4 года назад

To the point and Concise are 2 different things. To the point this was. Concise, it definitely was not. You butted the gas block all the way up against the flange on the barrel.. A huge no no. What method did you use to make sure the gas port on the gas block was directly over the gas port on the barrel? To anyone watching, please keep looking until you find the proper way to install a gas block. the compressed air way from Wolf in Sheep's Clothing is not a bad idea...

4 года назад

you dont know if it's aligned forward to back ... but ok

@robertgantry2118 Год назад

I'll try it. I've always just tried to eyeball it. I haven't had any trouble so far but it's kind of a pain. The pencil mark looks much more simple. Thanks. Have you seen those little dimpling jigs? If so, what do you think of those? I think if they actually work then it would make lining up the gas block a snap.

@Alkaline7.62 10 лет назад

Would be wise as well to find out frojm you barrel or gas block manufacture if you need to retain the .025 inch aspacing off of the gas block shoulder to compensate for the thickness or the handguard endcap that is unused on low pro blocks. Otherwise your gas port will not even be close or yoand the gas tube can stick inside the receiver to fare and be bent or damaged

@seanmtactical6069 8 лет назад

+djalkaline1 Not really. Even if its supposed to be there and you butt up the gas block, you still hardly ever impede gas flow. This is for all the major brands that make low profile gas blocks. There are some exceptions out there in both block and barrel, but figuring out if it's needed is fairly simple.

@Remaagen 9 лет назад

You didnt compensate that 1/16th gap for the handguard cap.

@nsz85 9 лет назад

Idontcare_626 Yes. Yes I did.

@LeePhan79 9 лет назад

nsz85 in the video your gas block hits to the end. You did not place 2 business cards to compensate for the handguard.

@gmnelli 10 лет назад

Nice vid! Watched this after watching your Geissele Mk8 vid. Is that YHM gas block designed to account for the generally required 0.030" gap (a remnant of the hand guard end cap)? From my experience, the gas block does not sit flush up against the shoulder of the barrel. Generally though, the hole in gas tube/gas block provides enough flexibility. The easiest way to know fore sure is to use a micrometer to measure the distance from the shoulder to the center of the gas port and then do the same on the end of the gas block to the center of the gas port in the gas block.

@kryronterminator 7 лет назад

As far as I can remember, using a graphite on a part that gets very hot can lead to cracks due to the heat concentration in that localized spot. This is at least common practice in aviation, never is a pencil used on anything to do with high temp ducting or engine parts. Just a heads up.

@soconnoriv 7 лет назад

Jason Lees, lol found the aircraft mechanic. I came here to say that too.

@waaynneb1808 5 лет назад

@@soconnoriv, Hahaha, it's funny that we aircraft mechanics (former USAF Crew Chief) noticed that particular issue with his video.

@chhhfbhcodo393 4 года назад

aircraft mechanic also checking in for this comment, no graphite!

@toadfromgrove 5 лет назад

Should the gasblock be flush against the barrel ridge? I had a shop put a floating handguard for me and he left the gasblock away from the ridge a bit. Now the AR ejects, but looks like it doesn't go far enough back to chamber the next one. Instead it gouges the next bullet in the mag.

@EricKPoorManPrepper 7 лет назад

Ahhhh,.... Toshiro Nagasaki...!! That's easy peasy! Japanesee... LoL. No racisim....!

@neogeo8267 5 лет назад

Just saw Barrett's new REC10 - they key their gas block so it can't be installed wrong. Nicee.

@Dustysa4 9 лет назад

I'm trying to figure out if that YHM gas block will fit under my handguard. Do you happen to have the dimensions?

@robertbowen9417 10 лет назад

just getting my first ar 15. We be scouring your channel for info.....thanks

@maddoxinc1642 4 года назад

If you've never done this or its your first time, take some good advice and find a gun smith to do it. The $40 you'll pay to have your barrel dimpled properly will save your barrel. If you plan to do this more often, buy the tool that centers the dimples and has guides. No reason to half ass it, these aren't the dark ages..

@delav83 9 лет назад

How do you feel about the durability of the clamp on type? I have a Yankee hill gas block coming. I'm replacing my set screw type because my dimples were out of alignment leaving my current set screw gas block canted. Aggrivation.... Anyway thanks in advance for your input.

@Khyrid 6 лет назад

My gas tube fits snug inside the upper so I don't really have any play on rotating the gas block any, I assume it is aligned correctly as it only goes in one way.

@jamesshride3158 7 лет назад

So simple and yet so perfect. Thank you for this video.

@SWED510 3 года назад

I used a spaghetti noodle. Takes human error out of the equation lol

@PewPewDave 5 лет назад

Do all ar-15 barrels have that lip that prevents the gas block from sliding down too far?

@AdoreYouInAshXI 5 лет назад

Not all, but most.

@crypto_pinto2660 6 лет назад

I love your videos but something about this installation I'm a little confused because if you were to install a drop-in handguard your not accounting for that little bit of a space you need it should be a gap the gas block should not be resting up against that lip I was told you need to leave room for the end cap of a drop-in handguard. I just installed a gas block and it worked perfectly I also left room as if I were putting an end cap there to install a handguard but I chose the free-float method instead but that slight Gap is still there I do not recall the exact measurement. If I'm wrong please help me out explain

@michaelshanahan4965 2 года назад

Feeler gauges against the collar

@timherrera8500 3 года назад

And for and aft port alignment?

@kyana3374 7 лет назад

mine has hand guard sheet metal.are gas holes going to line up the other way. forward and rear

@deanhenthorn1890 3 года назад

I use a spaghetti noodle.

@libertybellmedia 2 года назад

My SPR build is neither cycling the next round nor bolt locking to the rear. I assume it's undergassed after eliminating the magazine, spring and buffer weight/spring. I learned that some gas blocks are not up against the shoulder tight, so I'll find out tomorrow when I test fire.

@hairydogstail 2 года назад

Short stroking can be caused by many problems along the gas system. You should try a different bolt carrier to see if that helps. If not it can be a clocked gas block which is best to verify alignment with a bore scope. Then it could be a loose gas block to barrel journal, gas tube leak in the gas block, cracked gas block or cracked gas tube, out of spec gas tube button checked with a gas tube gauge, loose carrier key or an inefficient bolt carrier 3 bore..If all that checks out then your gas port is too small for the ammunition you are using...

@wolf7n6 Год назад

Thank you

@hubus83 6 лет назад

Great video! I made a mistake by not sliding the gas block ALL the way back to the barrel. I had really bad gas blow back, from leaving a gap between the block and barrow. The smallest things. Facepalm.

@marshalljones4315 8 лет назад

do you push the Gass block all the way against the stopping point for the gas block or is their supposed to be a little gap between the barrell stop and the gas block?

@nsz85 8 лет назад

+Marshall Jones-Paragon Fury It depends on where the gas port location is on the gas block. You have to figure that out. Some do not require a gap but some do.

@jasondancause6689 7 лет назад

Never watched ur vids before ive built a few AR's but this is a great tip i will be tryin this for sure in about 2 days when i finish my 300 blkout build

@mglu211 7 лет назад

on my DPMS LR308, I placed my block flushed with the collar ... I have a free float hadguard, so do even need the spacing in between?? if I didn't leave space will I have issues ??? ( since I don't need the handguard cap)

@crypto_pinto2660 6 лет назад

There should be a very slight gap between the shoulder of the Barrel in the gas block if you did not leave the space keep in mind that the hole in the gas block is bigger than the hole in the gas port on the barrel so it allows for a slight difference

@Chchchchchivo 4 года назад

Is there a tiny gap between the barrel and gas block or should it be flush together. (The gas block to the barrel stop portion that stops it from moving past the gas port on the barrel?) Thanks for reading.

@hairydogstail 2 года назад

There can be a gap between the barrel journal shoulder and gas port depending on if the barrel was cut for a hand guard cap..

@jaysfiveohhh 9 лет назад

great and simple idea thank you! what brand gas block is that?

@kb2zya 10 лет назад

I wish I seen this before I built my ar 15. It took me weeks to get it right .Thanks for posting.

@neighbor18 3 года назад

This is what I needed. Something more than eyeballing it.

@jaket.9193 9 лет назад

any tips on installing a tight gas block? its 0.934" instead of 0.936". thinking the freeze (barrel) heat (block) method!?

@seanmtactical6069 8 лет назад

+Jake T. Best advise, don't do it. If you cannot find one that fits correctly, you will have to ream it out with a piston reamer. BTDTGTTS. What a pain in the ass. You are best off taking it to a shop that specializes in ARs and getting some assistance.

@bustertn2014 7 лет назад

The little plastic pins they sell over at Brownell's for about 10 bucks are even easier than this. Takes about 15 seconds to set your block.

@WeAreNotAlone69 6 лет назад

You can also use a toothpick vs those plastic pins. Takes about a minute to cut one end off, drop in gas port in barrel. Spin toothpick around a few things to mark the next cut needed (total length.).. Make sure it fills up the hole, but yet is loose enough it will move under it's own weight. Cut end sticking out of barrel.. Pesto you've made a line up pin.

@bjornhaavard 8 лет назад

Thank you for this 👍

@wncoulte 8 лет назад

Great Video!!! Thanks. Felt this was a process overlooked by many others out there who publish these AR assembly videos. Again, thanks!

@jhgroomes 10 лет назад

What brand gas block is that?

@130bowman 10 лет назад

You know way more than I do about ar 15s but, you should never use a graphite pencil to mark metals that are subject to high temperatures. The graphite concentrates the heat and may cause cracking.

@nsz85 10 лет назад

A pencil line will be just fine. I guarentee it.

@roberttuttle5963 7 лет назад

liked video wright to the point seems simple enough thanks.

@ChanChan3255 9 лет назад

So does the inner side of the gas block not attach to the opening in the barrel? It's just a matter of lining them up?

@nsz85 9 лет назад

+ChanChan3255 I am not sure what you are asking. Sorry.

@ChanChan3255 9 лет назад

+nsz85 I had thought that there would be some small piece of the gas block that would fit into the opening in the barrel (or vise-versa) in order to ensure that the two holes are lined up with each other. But it looks like it is possible to have the gas block secured to the barrel without being properly aligned with the gas port. So basically, when you install you a new gas block, do you have to fire/cycle the gun in order to be %100 sure that the gas block is correctly installed?

@nsz85 9 лет назад

+ChanChan3255 You need to make sure it is aligned. There is some wiggle room as the hole in the gas block is typically larger than the gas port in the barrel. If you watch this video and do what I did, you will have it aligned properly.

@mikeyriv7564 10 лет назад

What brand of gas block is that? Do you think it will fit under a midwest industries key mod rail?

@nsz85 10 лет назад

www.midwayusa.com/product/462151/yankee-hill-machine-gas-block-low-profile-clamp-on-ar-15-lr-308-standard-barrel-0750-inside-diameter-steel-matte

@silverwiskers7371 2 года назад

an absolute stroke of genius

@danielmackormack8524 Год назад

Thank you

@LilYeshua 7 лет назад

It works for me. I used it yesterday on my low profile gas block install.

@shawngansert1973 4 года назад

Great info and awesome video. Thanks!

@lkazanov 10 лет назад

the key to your method is the business card. Cool idea of using flexible 90 degree square to index of the gas port shoulder.

@nsz85 10 лет назад

lkazanov Thanks! It works pretty good :)

@whatfreedom7 7 лет назад

Anyone know what kind of torque specs clamp on gas blocks use? Are you suppose to use thread lock or stake the screws?

@christaylor4086 6 лет назад

Staking can help and regular blue locktite will burn off.. There is a product called Flexbar Rocksett which is a high temp thread locker than will withstand 2,000 degrees F.

@joecool7606 3 года назад

works for me thanks!

@money9953 7 лет назад

great trick

@TonyC-pq7bp 3 года назад

Easy 👍

@Parado1994 5 лет назад

Thanks, very helpful, and kept the video nice and short.

@nunyabidniz2868 3 года назад

I hope you put more care into actually getting the pencil mark on the barrel properly centered IRL than you did in this video! Meanwhile, the spaghetti noodle trick still takes the cake for most outside the box approach, IMHO.

@Farmer_brown134 2 года назад

Spaghetti noodle trick?

@hairydogstail 2 года назад

@@Farmer_brown134 Bore scope is the best way..

@christopheredgecomb5630 6 лет назад

Going to be attempting this today on my upper rebuild today. Simple, easy, and to the point. This was the one thing I was unfamiliar with doing.

@nigellegall755 7 лет назад

Great , simple, Thank you. (no purchase necessary.)

@Surviving65 8 лет назад

I'm installing an AA xlp, unable to find many vids on the installation. so I line it up, should it be pushed all the way back to the shoulder, or should I have a gap? The drive rod needs to fit 2 business cards between it and the gas block. will it then touch the block after removing the cards?

@Surviving65 8 лет назад

and yes, first AR. decided to build it instead of buy it.

@mglu211 7 лет назад

Surviving65 ... did it work placed all the way back ?

@goldencobra1-205 7 лет назад

how can you determine the right gas block for a free float barrel? Is .750 standard? I'm just confused and don't want to purchase the wrong one. I have a .223/5.56 barrel 1/8 rot.

@gw9853 7 лет назад

Get a low profile gas block. And yes a .750 is standard the smaller size is for thin profile barrels. Good luck!

@jazmar1891 6 лет назад

Thanks I had the same question and you answered it, Thanks

@madride858585 4 года назад

Why would you dislike this video?

@hairydogstail 2 года назад

Because a bore scope is the best way to verify port alignment. He also didn't m,measure the gas block port to barrel port to journal shoulder fit..

@EverythingisFire 10 лет назад

Haha weird. I haven't even thought about that! Glad I watched this before the install :)

@philliple288 7 лет назад

good job, I agree that is the way it should be

@matty86suk 5 лет назад

Using a dimple jig is the proper way, this is bubbas method

@ParasitikOne 2 года назад

If you are using set screws that interface with dimples you would be correct… but this is a clamp on (dimpleless) gas block attachment

@topshottakong 10 лет назад

lol wish I coulda seen this a couple weeks ago. great idea

@Khaosriged 9 лет назад

Does there have to be space in between the gas block to compensate for the handguard cap to line up the holes or can the gas block just sit flush

@seanmtactical6069 8 лет назад

+Khaosriged Not always, see my stand alone post from today on how to check.

@MCP-km6im 8 лет назад

+Khaosriged ... +Sean M is correct. I previously had the same concern with spacing. On a related topic -- and Sean M can correct me if I'm wrong -- but it's also fairly simple to line up the gas block/gas tube simply by installing it. After installing your barrel, torquing your barrel nut and sliding the gas tube (that's already attached to your gas block) into the upper receiver, you're pretty much lined up. After that, tighten down your gas block set screws while making sure you're not twisting the gas tube. I have used this method for a couple of years when building ARs and have had no problems. Just my two cents.

@jprach4982 4 года назад

Solid videos dude

@rjjones1106 8 лет назад

If the ports aren't lined up would that cause a failure to feed?

@nsz85 8 лет назад

+Ryan Jones It would not eject.

@enigma6482 10 лет назад

Simple, yet brilliant. Thank you.

@T.A.B.Videos 10 лет назад

Good info, thanks

@fckinsanders2215 7 лет назад

I was considering this, however, if you shoot a lot in one sitting, this could be detrimental to your barrel. The carbon in the "lead" of the pencil, when heated enough changes the molecular layout of the steel causing cracks and eventual failure. I don't know what the temp range is for that, but I know on exhausts if you score it with a pencil, there will be a hole in the exhaust before too long.

@nsz85 7 лет назад

No.

@fckinsanders2215 7 лет назад

Phil, I'm neither. What I said is a true statement, and your lack of understanding about said subject shows you have nothing intelligent to add to the conversation. Don't believe me about the pencils destroying exhausts go ahead and draw a big circle on your headers and let me know how that works out for you. Hope you got a few bucks saved to replace them.

@WeAreNotAlone69 6 лет назад

F*ckin' Sanders is correct . What I do is instead of writing on the barrel /gas block is to use tape.. put markings on tape.. then peel it off when done.