Umarex Gauntlet: Disassembly and Tweaks 

Like everyone else said, great vid. It inspired me to take mine down and do some needed polishing on all rubbing parts and especially the barrel. In the process, there is a small round seal about 1/4 inch in diameter and the same in height that can pop out. It is the transfer port seal. It goes between the pressure tube and the breach block. Mine did just that and it took me a while to figure out where it went. Mr.Hagjimoto confirmed I was putting it back in the right place. Another thing about the Gauntlet, it has a floating barrel that is subject to major point of impact shifts if it is banged even the slightest bit. It appears to stay on target once it is set up but don't grab the gun by the barrel or lean it against anything with the barrel touching. The barrel is locked into the shroud and the shroud is a bit heavy. They are both supported at the receiver end and there is a lot of leverage that can work against stability. One method of helping this situation along would be to add a barrel band except the air cylinder, to which the band would be connected, is large and not rock solid in itself. This is a condition that will be open for a lot more discussion as these guns come to market. One good thing is that my gun stacks pellets on top of each other at 40 yards as long as the barrel is not disturbed.

Excellent video. As an airgun store owner with two Gauntlets on order, this is invaluable information. I try to do as much tuning as possible up front for my customers. Not sure I will do all this but perhaps if I keep one for myself. I'd also like to take an opportunity to address several folks who are expressing disappointment at the over-all workmanship. $300 gun people! Lets get real. A regulated PC with the features on this gun for $300? I sell, and really like, the Gamo Urban which is unregulated and also $300. Every one I have sold has been a tack driver but have lots of little irritating things like flashing not properly trimmed on the stock. Again; $300. Make your expectations match the price. If you want to spend $800-$1000 you should expect much finer workmanship but at this price point if you don't think you are going to be doing some clean-up and tuning you have unrealistic expectations. People were raving about the Stormriders at $200. I have 3 in my store and have made one into a project gun. Into it now for another $200 and I almost have something close to the Urban. Oh, wait; but he Urban is $300. Like I said; adjust your expectations. Looking forward to your follow-up videos.

Your presentations are really very comprehensive avoiding technical terms. This make viewers understand the process more easily. Great job!

Good Job Haji !!! Thanks for all the information on the teardown you gave a lot of good advice that most people keep to them self. But knowing you, You share what you find. For us non Engineers you make it simple for us to understand and the pictures are a plus it took time for you to put this together so thanks! Keep in touch

Nice tear down demo, can't believe how rough it is made, no polishing of the moving parts to make cocking the bolt smoother. When I got mine, I was cleaning the barrel before shooting it, the end of my cleaning rod unscrewed and came off and was stuck in place in the breech end of the barrel. I proceeded to remove the two screws on top to remove the barrel but like you said it was difficult to pull out the barrel. I thought part of the the transfer port might extend to some degree into the barrel and may be the reason why the barrel would not come off and I was not about to do a major tear down on a brand new rifle that I'm so eager to shoot so I decided to re-align the barrel and fixed it back in place. I was able to eventually push out the obstruction with the use of weed eater nylon string. On hind sight, I'm glad I did not go on further to remove the barrel otherwise I would have also scalped those o-rings like what happened in your video, then I would be waiting for o-rings instead of shooting.

Awesome video, just purchased my first gauntlet and am excited about all the mods, in fact your store was the first stop for some of my parts! I like the simplicity of your videos and the common sense approach to your tuning. Please keep up the great work!

Arigato Sensai Mr. Hajimoto. You are the first person on RU-vid to do reassembly video on Umarex Gauntlet. You are my best physics teacher. Strongly appreciate your efforts to educate others and share knowledge. God bless you with health, wealth and happiness.

Thanks Haji...when my grandson gets out of school...maybe he can figure it out. Looking forward to finishing this vid.

nice job. i just tore my 22 down opened my barrel port up, polished hammer and tube shimmed .187, polished adjust trigger, and shimmed my pressure regulator .020. my results were 921 fps avg with 18.3 exact jumbo diabolo and 962fps with some piranha hollow points 14.3 grain. im more then happy with it you just cant beet it for 300 bucks

This has been the best video on describing the faults and repairs you carried out ,,along with the end results,,I have ever seen on youtube pertaining to an air rifle..very clear and not over the top..As for quality the old saying stays the same You get what you pay for As for myself I paid a lot more for my BSA scorpion in 22 caliber,,out of the box it puts every pellet through the same hole..the term getting a good grouping does not apply to a BSA product,,a cold hammer forged free floating barrel makes all the difference,,Its just a shame here in the UK our rifles are limited to 12 ft pds of energy...Nuts

Excellent video Haj! This moved the Gauntlet up a few clicks on my “Best buy it now before she divorce you” list. Now I will feel confident working on this gun before it fire its first shot. Being regulated makes it a treat as well. 👍🏽👍🏽

Great to see whats inside and your comments. Looking forward to you sharing more as time goes by.

Would have liked to also see the valve and it's teardown. Thank you for doing this very informative video. Look forward to the follow up.

Wow Haj, this was one awesome presentation. I really like the way you turned this into a slide show presentation. It reminds me of the way things were taught back in the 60's and 70's when I grew up and even the military's way of presenting information. I just subscribed and look forward to more of your videos sir. Very eloquently spoken, I'm just blown away at this presentation. It's almost like "hey this guy gets me"......I mean its like you absolutely knew what we were looking for? I wish more airgun youtubers would take this slide show approach. Thanks man.

Great job, excellent presentation of the dissambly and areas of work needed. Very much looking forward to your results in a future video!

Finally shot my .177 today after scoping it. Haven't even done any mods on it and already stacking JSB's at 30 yds! Also shooting from my sons pier out on lake and hitting stuff from 20 yds out to 80 and 90 yds! Can't imagine what it will do after mods! Love your vids...very informative!

Great video Haji!!! Would love to put a bigger bottle on mine. But after this video - seems like a tear down and a good polish would do wonders. Never thought about the vent hole - ingenious!!!

Great video Hajimoto. Thanks for taking the time to do this.

Thanks for the great teardown and analysis, Hajimoto.

Thank you. It's about time someone did this. I'm glad it was you because it's in depth and inventive. I imagine many of us will do these mods. I immediately adjusted my trigger when I got it. I was about to drill a hole in the barrel shroud and was thinking of spring adjustment when I came across your video. Thank you again.

Great video- my trigger assembly came loose after 3 months(1500 rounds) luckily the gauntlet 2 has a similar breakdown- a little lock tight goes a long way- your breakdown vid greatly help- problem solved- thank you

Great vid man! I'm very curious to see the tweaks that everyone comes up with for this rifle. I look forward to more! :)

Well done...finally got to see the whole video and looking forward to the follow up showing how u cleaned up the various parts and hopefully I can do the same to mine...thanks

Hi Haj, Very well done! I just received my Gauntlet .22 and I was hoping to see a breakdown video. My biggest concern with my Gauntlet is the trigger. I will be polishing and adjusting it soon. I commend you on your presentation and hope you produce more soon!

Many thanks for your time and analysis of the GAUNTLET.. Much appreciated..

Yeah... I specifically waited for more experienced cats like you, Ted (yes Ted's holdover Ted) and a few others to let us know what's up. I'm dirt poor so $300 is still an investment especially needing at minimum another $150 for a reliable pump (as I'm more than likely going to buy a yong heng for around 300) it's about a year off yet for me. I could sell something sure (Gibson SG special and a MESA cab available ). Anyway I don't go by manufacturers words. I prefer real world. Thanks for the awesome vidz and the taking some tbh very off putting statements "elsewhere" . Saved me from a nightmare......

Great Job!!, This is one of the best videos I've ever seen, the way you showed pictures and sketches made it very easy to understand the information you were presenting Thank you

Let me be the first to say, excellent job!! As a Gauntlet .177 owner I really appreciate the time you took to produce that video and I'm glad it will be available for future reference. Being a fairly new subscriber I like the technical approach you lend to your videos, like this one and the bluetooth triggering device for your camera. Well thought out and nice execution. As a side note the trigger on my Gauntlet left a lot to be desired stock. Have you done any tuning on your trigger yet?

Haj, Very professional. Can't wait for more. I am awaiting the changes you made and how it will shoot now. Hoping for more than a 20FPE gun when I get mine. My Discovery is a 20FPE gun and was hoping the Gauntlet would live up to the hype and get 28-30FPE, in .22. Again, GREAT JOB.

thanks for your honesty, saved me time and possibly 💰 the gauntlet was going to cost me $246.00 but I can save up a little more for something better. btw great videos very informative keep um coming found ur channel through southern gunner 👊👍

Great vid. Thinking about getting a gauntlet just to plank around the backyard

Hey brother Haji, I have my Gen 1 all Haji'd out, but I haven't shot it in well over a year, so it's gone flat. I think it needs a tear down and total O-Ring replacement, so I look forward to this video. Mike

Thanks for the video. I have watched again. I am thinking about removing the barrel and open up the trans port opening. 😁

Great video on the gauntlet tear down, thanks I learned a lot.

Very helpful video I was able to fix my umarex for 50 cents 🤟👏

Is there a more specific video showing step by step in order what all needs to be drilled and polished in the barrel and breach to improve the efficiency of the transfer port and hammer. This is a good general video but not and exact demo. Thank You for the great informative vids. for all of us airgunners.

New owner .22 PCP GAUNTLET. You definitely seem to know your s***. Educational. Ty much. Mike 👍👌🎯🙏🏻

What can I say Hajimoto you make it look easy and it was very informative. Maybe you should do something like that for the marauder so maybe I could learn to tune or tweek mine.

man datz a sweet gun !!!! i dont regret my nova freedom instead but this was my first choice and one day ill get the umerex hammer ! awesome vid Haj ,enjoyed it !!!

Looking forward to part 2, thanks for the info...

How did you polish the tube and hammer? Like method for polishing the tube?

Great Vid, as always... Very well spoken and clear and EZ to understand... 2- Quick Questions+ 1.) Did the Vent Hole in the barrel shroud help lower the report of the shots fired and/or do anything else to add benefits??? ......AND...... 2.) My Plastic "Bottle Shroud" isnt on tight like it should be. It doesnt touch the barrel shroud or cause any real issues, its really just mostly annoying with my slight ocd. It only has a tiny bit of play in it. Just 2 or 3 hairs worth of movement (wiggle) to it. I tried taking it off, then putting it back on then only snugn up the 2 +screws on each side just enough to hold (but not over tight) but it still has that tiny bit of play/wiggle/movement in it that gets on my nerves at times... *Do you know of what i could do to solve this issue? ......Anyway....... Thanks for the great Vids and Info. You give so much more help than the the maker that should be the one stepping up to help so a BIG THANKS... ~DrJones~ [01/07/18]

just shot my Gauntlet in .177 accuracy is exceptional for a 260 dollars pcp , best pellet so far is the Barracuda Match 10.65 gr 4.52 , i tried other pellets from JSB, AA, Crosman, RWS , All in different weight, here's a sample of a shot string with Barracuda match 10.65 . 836, 836,838,833,830,833,833,838,831,833, HI 838, LO 830, AVG 834, ES 8, SD 2 , 40 yards accuracy .333 . As you stated is the velocity is a little lo i wish it was a little higher for this weight pellet . just wanted to share this info with you.

Kinda reminds me of my Umarex Octane,... Very crude machining & I even had damage to a new piston seal as soon as I put it in because of the metal burs all over the cylinder was scratching the seal. I put some sand paper on a dowel & cleaned it up best I could was it was a little surprising.

Great and informative video. Thanks for the time and effort. What SW did you use to track and stitch the pellet impacts at 28:21? Would love to use it as well to keep track of my tunings.

Thank you for this video I was hoping that somebody would put out a video on a tear down of the gauntlet. I'm very much a newbie when it comes to PCP teardown. Can you put out a video on how you polish the parts and what tools are used? I really want to get the most out of the gauntlet. I've been playing around with a stock gauntlet and been pretty much happy with it the ways performed. I got rid of some vermin that was getting too close for comfort to my home already. So I can only imagine after tweaking the rifle how much better it will be.

I removed my stock. A small piece of rubber fell out. It was maybe 3/4"long, 1/4" wide, with a fiat side and a curved side. The curved side fit the shape of the tube that the air tank screws into, that runs the length of the gun. The tube with the hammer assembly, degassing hole, that the trigger assembly screws to. It took me some time to figure out where it came from. It is placed just ahead of the hole in the stock, that is just forward of the trigger assembly, that fastens the stock to the mane tube frame of the gun. It is a cushion spacer that keeps the stock from contacting the frame tube. Without it the stock mounts improperly. May be that spacer is missing from your gun or has moved out of position, causing the fore stock to touch the barrel. Just a thought.

I love the video I'm absolutely going to use it to upgrade mine only thing that you missed was trigger adjustment my trigger came out of the box with a whole lot of creep at felt like sandpaper I adjusted it and it's much better but now trigger is super sticky if I take up the creep and then let go trigger will stay in place instead of moving forward into its original position

very interesting video Haji. I have been thinking about one of these. To make things simple for me, when you get all the tweaking done, just send that gun to me for some testing. Then you can buy another and start over.

I'm new to PCP air rifles so your video was awesome with helping understand it. I'm not new to guns and shooting but taking this apart to Polish the hammer and tubes, that you did is a bit intimidating. I did get the .22 and am loving it. Some quick questions and requests. Mine came with the same bottle gauge you have and they are not the same gauges as werr in the prerelease vids. Those were much easier to see the bottle pressure. Can it be changed? How? I know you can adjust the trigger tension. Can you do a vid on that? As for Your dead shot stand. Couldn't you just slide the forward support back to reduce tension on the shroud? Thanks for all your help.

I picked up a Umarex gauntlet . 177 and it's fresh out the box I went out hunting today with it for my first time and I noticed I had jammed two pellets in the gun I used a Rod to get them out . But what I noticed today aswell Is I can hear leaking air coming from the barrel after inspection I also noticed it leaking from the loading area . I don't know where to go from here .. Everyone on Facebook kept saying go ask you your one of the best at this brand and knowledgeable about all calibers of these guns any help

Very nice video.... question,though... the way you stacked the brass washers is actually a type of Belleville washer/ spring setup. Aren’t you concerned that, through use, the soft brass will eventually peen, and become smaller. Believe me, I’m not being critical, just wondering.

Nice video. I don't own a Gauntlet, and after this video, I will never get one either. Not much pride or craftmanship there. But still really enjoy your vids and shooting. I'm fascinated about how airgun works, both springer and pcp's. So thanks for making my nightshift (nigth her in Sweden now) little more easy to endure.

Maybe one day I'll get to use it

Good Video Hajimoto, this must be the rifle of the year that many people wanted, now the .25 cal will be out at the SHOT show.

Thank u so much for all ur upgrades and tweaks u have posted videos of for us. I have a gauntlet on the way. Should b here by Wednesday. I will b getting a hold of u soon for the barrel band and the shroud pieces. I just hope u can tell me what u used to buff the inside of ur tube before u put it back together? And did u need to put anything down the tube to stop any shavings from getting on the things that were not disassembled?

Great video... learned a lot!

I just got mine in .25 Cal and wanted to know what size hole I should put in the barrel shroud. I don't think you said on your .22 either. (Different regulator sizes) thank you and great video. The only other thing I can think of is maybe changing your mouse pointer color, it was hard to see at times. Thanks again.

Excellent job, but it raises a couple questions for me that I did not find answers to. I just received my Gauntlet .25. I am new to this level of air rifles, so forgive my ignorance. What size hole did you drill in the shroud, and how far from the end. I assume it is calculated to face downward toward the breach when reattached? Second question is, what is the process to polish the hammer and tube? Special tools required etc.? Thanks for all you do, I am most appreciative.

Haj.I have a new .22 gauntlet and I dont think Im getting near 800 fps,but I don't have a crony.I watched your other video about increasing the regulated pressure with the washers in the air bottle.What do you suggest? Many Thanks Dave PS I subscribed to your channel,I love the little choke comments you add!Keep up the Great work.

Thank You Hajimoto for this very interesting video.I am wondering if you already made your research on the O-rings required for this air rifle. If yes would you please share with us. Your reference regarding O rings being damaged during barrel removal triggered a concern on my side :) BTW for UMAREX as it seems that you are monitoring this channel: please note that the plastic air stripper is also cracked on mine...and I did not shoot a single pellet yet! Any suggestions about how to get a new one?

11:35 That 11 degree crown is in the opposite direction as a traditional 11 degree crown. This are almost flat. This crown looks like it could use help, although it seems to shoot well enough.

Thanks for another Excellent Video, It is to bad Umarex didn't put a screw for adjustment in that rear cap to adjust the Hammer spring tension.

Great video Haji, love my22. Concerned about how hard it cocks. That spring on the hammer, any chance I can lighten it or no. Thoughts please. Keep up the good work.

On tear down. Did you come across a rubber piece that was about 1 inch wide, 1/2 in deep, 1/2-3/4 in high, flat on 3 sides and concave on 1 side which had the curve of the barrel?

I am a newbie to airguns just bought my first airgun which is a gauntlet I just want to say a very good video I know I have been waiting on someone to give a breakdown video on the gauntlet just want to say again thanks a lot can you answer a question for me I noticed that you changed out some O-rings can you tell me where I can get O-rings for the Umarex Gauntlet 22-caliber

Hi there Haj!! I am new with air rifle and currently shooting a springer. Lately PCP calls my attention specifically with this Umarex Gauntlet where so much positive review, I am planning to get one because of it's specs at this price point...would you recommend me somewhat disassemble it and do some work on it? thanks a lot I enjoyed your video about Umarex Gauntlet.

My air stripper is stuck in the shroud when I took it off, just wanted to check it out, but I do not have anything long and straight enough to push it out, lol, not sure what to do about that except a long dowel rod, which I haven't got. Anyway, if you increase the transfer port, does the transfer port seal change size, or are you just cutting the metal that encroaches into the port from the valve, or don't touch the valve? I understand that the barrel port can be increased a bit not exceeding 80% of the breach diameter, if I understand and word that correctly. What I don't understand is, how do you open the port from the valve into the breach What keeps the transfer port seal in place, and what metal is actually cut? and What tools are needed to increase the port dimensions? and, What tools are required for the polish of the hammer and inside the hammer tube? I know this is a long series of questions, and I understand you are busy. I just got the .25 cal, and I am still ignorant. So if anyone reads this comment and has any Ideas or videos to recommend, I would appreciate the guidance, and I know that anything I do decide to do is at my own risk, I hold no one responsible for their advice or suggestions. Still doing research, and I will attempt to confirm any recommendations before I attempt any mods. BTW, I really appreciate Hajimoto Productions, and all the knowledge shared hear. Thanks for the info, Keep up the good work.

wow thanks for the info here I am saving up to buy the gauntlet (I'm strictly out of the box shooter) I don't (or am I capable) of tinkering stuff. I guess I'll go look at the Gamo Urban instead now great Job !! domo arigato Hajimoto San

One more. What about a vid on how to mount a picatinny on the shroud for a bipod?

Just ordered a 2300psi v2 reg. Hoping it flies the 33,95gr JSBs the most accurate and most power possible. Thank you

Hello GREAT VIDEO MY question is do you think that the problem you noticed and fixed is their standard tooling or isolated situation. Also can I use my drimel to buff out the gauling

Great video, very helpful. Thank you

I got my gauntlet last tuesday and the seals on the pellet prode ripped to pieces the next day, where can i go to get new ones, they are super small

Great video, I got your tune kit today with the no ring for Gauntlet .22. I was wondering if you have any information on the proper removal of the valve?

thank you for the very good video...It was just what I needed...You'er right about the piece at round the tank mine did not fit at all . Now I will check it fit making sure it dose not hit the barrel...I have the port size did you drill them out to

Hello Haji can you do a tear down on the umarex origin that would be awesome your review help me decide to get mine and I love it first pcp thanks

I just love your intro plus now I’m getting this gun now

So, great video,, very helpful. One thing I either missed or you didnt mention is the port in the barrel that is 4.1 mm. did you enlarge that port to the same size as those in the valve? thanks again

Great , infomative video ! Just got mine in .22 and am very pleased with the accuracy. Its only got about 75 shots thru it so its still a little " rough" but its getting smoother as i shoot. My question is, do you know what number/size o-rings are on the bolt probe ? I noticed one of mine is sheared off a little and I'd like to replace them both with " good" ones. Thanks for any help , Keep up the fantastic videos ! Ted

Just a suggestion, instead of using your cursor on your computer to point out the parts of the rifle via computer photo, I think it’ll be easier if you demonstrate the actual tearing down(live video)

Awesome video sir liked and subscribed i just got my gauntlet .22 on the 8th cleaned the barrel. And shot about 70 shots to check the shot string with air arms 16 grain i average around 780 does that sound normal. Also had a cracked air stripper on arrival sent picks to umarex will see how thats handled

Nice video man! Maybe I missed it somewhere, but I can find any info on the o rings. What sizes are they? Or do you just get a set and see which fits? Thanks Haji!

Your hat size must have increased since this vid. So I won't say great vid. (GREAT VID.) OOPS!! One comment, I also have a QB78 and have put some Archer upgrades to it. The Gauntlet is very similar to the QB. The $300 for the Gauntlet is scratch, the SCBA tank, fittings, HP air compressor (I live in the sticks) will set U back more than $300. Please do more on this gun.

Excellent

Great video. I've seeing some reviews saying people are having problems with the air splitter, and are sending them back for repair. But these comments seem to be from 2 to 3 years ago. Do you know if they have fixed this problem? I want one but I can't afford to be sending it back all the time.

Lovin these video"s! How to you polish the inside of the tube? I am wanting to polish the hammer with 1000 sandpaper like you did on the trigger. Can you use the sandpaper in the tube also? I just don't want to mess up my new gun!

nice tear down and explanations.not to loose sight that its a $300 gun.

Have you torn any Gauntlets down recently, and if so, has the quality gotten better or worse? Great Video, excellent information.

Is there anyway to tighten up the cocking handle mine has become loose any help would be appreciated

What's the scope of choice for the UG .177? I have a Monsrtum tac 3-9x40 on mine.

wow u very detail...thx

Haj, How did you polish the inside of the tube? I polished the hammer to a mirror finish and polished the bolt and handle to a mirror finish as well. The bolt and bolt handle was to personalize my Gauntlet for myself, but I now find it glides a lot better in the gun.

Great video!

Hi man, what can be done with the air steeper? Mine is cracked too. Nice video.... saludos desde Isabela Puesto Rico. Cheers!!!!!

That pressure tube reminds me of a crosman 137 pistol.

Mine out-of-the-box cocking was very, very hard I thought this was not right. filled the tank to 2500 psi with the single-shot tray fed a pellet closed the action and took aim. took the shot, nothing. no air pellet is still in the chamber. I was going to d-gas using a new metal d-gas tool it did not work, I could not d, gas.will see if Umarex will help?

Great video. My .22 gauntlet is losing air. It’s not the bottle. Can’t decide whether to do a tear down to find the leak or just send it back. Your thoughts...

Great video what scope you recommend me for this type of rifle just bought one thanks for your time

Me gustaría que los hicieras en español tendrías muchos seguidores son muy buenos tus vídeos