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Pepperball TCP (or VKS) firing at high power - you must consider this!

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Important: Also watch part 2: • Pepperball TCP (or VKS...
The firing bolt and bolt spring are in an antagonistic relationship. In this video, I discuss the key issues you need to know to minimize contact between your firing bolt with the breech of your barrel. Some contact is unavoidable because a tight bolt/barrel bore-match is good for power and the bolt sits at the edge of the breech. High power comes at a cost and can create barrel wobble, too much shear stress on the firing pin set screw, unscrewing even with red locktite, and more stress. This vicious cycle will eventually break the screw. If your spring is weak initially or from overuse it may not guide the bolt precisely leading to more contact. In this video, I show how the firing bolt end touches all sides of the Grimburg barrel breech so it can't go cleanly inside under anything less than perfect conditions leaving little room for wobble. In general, I recommend you avoid using velocity settings that might fully compress your spring. It's all about finding the right balance for your particular needs and minimizing risk. Beware of con artist sellers who claim that high power doesn't damage your bolt. There are plenty of examples of this happening. Do your research and be smart.
Note: The firing bolt fits much better into the stock Pepperball barrel because the bore size is slightly larger especially at the breech end. This is a potential advantage of the stock barrel when shooting at power high enough to fully compress the spring. Rule of thumb: Just avoid the extreme upper limits to be safe and either barrel should work fine. Pushing those limits is guaranteed to cause headaches at the very least.
I am an end user and consumer like you. I don't upgrade or sell these launchers or parts for profit. I will not do that in the future either. The overriding goal of the Less Lethal sections of this channel are to provide as much information as I can that is free of conflicts of interest. You can then decide what is best for you and your self defense needs (and budget). Stay tuned and subscribe for my input as I get more detailed in my discussions.
Intro and exit created with the iPhone iMovie app.
Disclaimer: These are fun but they are not toys. Treat them as you would a firearm and follow basic rules for gun safety.
#pepperball
#lesslethal
#airgun
#grimburg
#pepperballtcp
#pepperballvks
#firststrikecompact
#firststrikefsc
#lesslethaledc

Опубликовано:

28 авг 2024

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Комментарии : 107

@ScaredyCatTactical 2 года назад

Go to 4:47 to see the part where the bolt touches the barrel breach when the spring is fully compressed. They completely contact during normal use and you can hear the sound each time. If the spring gets weak and leads to bolt wobble this contact may worsen. See Part 2 of this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rW0Fs7F1LIQ.html for more discussion and a close-up look at the scratching on the end of my bolt that results from barrel contact. Always follow best practices and take care of your firing bolt.

@ResidentialRepairs 2 года назад

I have the VKS springs installed in all three of my FSCs but I didn't know what the advantages or disadvantages was until I saw your video. Thank you for taking the time to make these videos and educate us and open a dialogue for discussion. I shouldn't bring this up but things are kind of taking a turn for the worst on all the groups and it's nice to have you putting these videos out to remind us that this is what it's all about, getting together and learning more in regards to the LL community.

@granpopo1224 2 года назад

hi, where do you buy the vks springs please

@ScaredyCatTactical 2 года назад

Thanks for the kind words. I started this channel with the hope of discussing complex topics like this so the LL community can separate hype from reality. These launchers have their place and we want them reliable. I don't claim to know all the engineering but I am tuned into identifying the weak points and will continue to point them out so maybe we can work together to avoid them.

@maxhauler 2 года назад

@@ScaredyCatTactical Cool man. Yeah my channel will be about the engineering and customizing .. Pellet/Air guns just as much as Less Lethal. I like simple elegant designs and then I like looking close at the physics and engineering. Air powered projectile devices are even older than industrial society, so it's a classic study of sorts.

@Tacoma5028 Год назад

Thank you for explaining this very helpful..

@ScaredyCatTactical Год назад

You're welcome. Hopefully this video reminds folks that these bolt firing pins do break if the power setting is too high.

@sven471111 2 года назад

Nice, finally someone makes the explanation visible,so everyone understands.Thanks for the video.For more power you also have to change more components and all this makes it really expensive.The stock price of a FSC can be doubled or more very easy.

@dynamo4826 Год назад

Wow, you really make me think about this now. The design seems kind of vulnerable as you say. Hopefully with care and maintenance it'll still hold up as long as we don't go crazy on the power.

@SpencerGaming7580 2 года назад

got t9.1 i made an upgrade for the firing bolt, i made a channel with a lathe on the inside at the bottom of the firing bolt and set a teflon ring in, this prevents metal shavings that together with the oil produces gunk. Also consider to change the o ring of the brass air pad to a polyurethane one. keep in mind, the more your velocity screw is pressed, the more air pressure you can get into the chamber and the more pressure you get in the chamber, the more wear you have between the trigger mechanism part that holds the bolt back and the bolt itself, look for the edge of the bolt next time you take it apart, when the edge is to round yout launcher will begin to fart, when you shoot it and blow of, i just turn the bolt a little bit to a part where the edge is still good btw The teflon ring removes any wabbling of the bolt and you get no scratches on the chamber anymore

@ScaredyCatTactical 2 года назад

Yes I saw your video talking about that in the past. You should keep them available for everyone. Very good insights. I am doing a video update on my bolt wear and tear and your comments here are very relevant.

@SpencerGaming7580 2 года назад

@@ScaredyCatTactical ah you saw it :) sorry can´t upload anymore to legal issues in my country :(

@Sola_Scriptura_1.618 2 месяца назад

I agree 150,000% with you. Chasing joules is fun, but from a performance and reliability perspective, all you need to maximize the energy produced by any air gun is a longer barrel! Give me a barrel long enough, and I can shoot a projectile around the world!😅😅😅😅

@user-xm3ou4uu6q 2 года назад

This is a great video. I appreciate your clarification on the spring(s). I was wondering what all the hype was about with those VKS springs

@ScaredyCatTactical 2 года назад

Thanks! To protect the bolt they are worth the investment. About the easiest mod you can make too by swapping them out.

@UmarexLessLethalHomeDefense 2 года назад

Great info bud :)

@maxhauler 2 года назад

I think there is another factor to consider and it centers around when that bolt is now moving back fast from the spring force and is approaching the sear. At this time, the air pressure is quickly rising in the air chamber and also, air/CO2 is still flowing at some pressure that is still below the regulator closing pressure, but also still high pressure and with air flowing forward. The spring has to overcome this sufficiently to allow the sear to lock onto the bolt. When we turn up regulator pressure, delete PRVs or increase the source pressure (or just turn up the power as is so common) .. then effectively that means the chance that the spring will not be strong enough to get the bolt back far enough will increase. I have seen this happen in combination with too much lubricant. The stock spring just could not get the bolt back against all that pressure. The pressure will be approaching full regulated pressure about the same time the bolt is reaching the sear. I again refer to "M17 HEAT CORE ANIMATION".

@maxhauler 2 года назад

The caveat in my case is that the excess lubricant (factory FS grease applied by me) could have been a major factor. But I have also seen this happen with a stock FSC with standard minimal grease on the bolt, but when I turned the power up almost all the way. I use a custom section of plastic coat hanger as an excellent tool to reset the bolt to the sear and also a shorter piece works better than wood in my opinion as a tool (at the precise length) to change the bolt o-ring.

@ScaredyCatTactical 2 года назад

@@maxhauler I have had some double shots before with the stock sear spring and bolt spring but after switching to the VKS sear spring and VKS bolt spring that hasn't been an issue in my TCP. But if the PSI is turned up too high (or with the TCP you use a 16g or 20g CO2) it could become rate-limiting again. It's all trial and error but that's what makes it fun.

@ScaredyCatTactical 2 года назад

That's great animation of the M17 heat core. I have watched that video several times in the past. Not exactly matched for the First Strike model but essentially correct in regard to the ball valve and how it works. I'm planning a deep dive into this in a future video.

@maxhauler 2 года назад

@@ScaredyCatTactical its funny how many times I have watched that thing. For some reason I just really like the blow forward design. I consider it very elegant. I mean it can be full auto with no modifications!! And a lot of timing and balancing of a lot of physics is involved. I even like the 80s-era Avant Garde synthesizer music (which I was into as a kid) .. and although I was a graphic designer for a while .. I even like the Windows 2000 slideshow app aesthetic. After studying this video about 20 times I feel like I have absorbed all the into it had to offer. Which it turns out was a lot. The guy who made is a bit of a hero of mine lol. (I realize I am a complete and utter nerd.) I look forward to all of your videos for sure!

@ScaredyCatTactical 2 года назад

@@maxhauler Yes, I have it bookmarked. I was a teenager in the 80s so I appreciate all that.

@YerBrwnDogAteMyRabit Год назад

This was great, very educational, thank you. It kinda looks like there's some drag on that bolt when you removed it and replaced it.

@ScaredyCatTactical Год назад

Thanks! Yes, you caught that. I didn't really focus on it until the next video which I call Part 2. It is linked in the description and in my pinned comment. It's minor but real. A yet some people to this day deny that the bolt actually contacts the barrel. It goes into the barrel on every shot.

@smokingunclefrank6037 2 года назад

Great video defiantly something to be concerned with 👍I guess somewhere around 30-35 joules is a safe place to be

@ScaredyCatTactical 2 года назад

Yes, you can't go wrong there. I try to stay around 40ish or below. It's fun to crank them up and destroy something once and a while but it comes with definite risk. I don't mean to burst the bubble of those chasing Joules but just trying to counterbalance some of the hype out there.

@FLAlesslethal 4 месяца назад

Everyone wants to keep going up up, more more! Well, past a certain point there's no more less lethal and it can even be just str8 lethal to yourself...

@ScaredyCatTactical 4 месяца назад

Yes some do because it's human nature. But I think many are also starting to wise up about what "Less Lethal" is really all about. Super high power is a mirage and comes with all kinds of failures, dangers, and legal obstacles.

@edmaslana4184 10 дней назад

Great content, new subscriber I'm addicted to first strike fsc's

@ScaredyCatTactical 10 дней назад

Awesome! Thank you! I love the FSC platform too. It's just easy to open up and service. That's really important.

@manoloholmes5973 2 года назад

So what would be the middle ground to optimize the Bolt and spring where would be the solution to pick up the power but keep the spring and bolt in good condition?

@ScaredyCatTactical 2 года назад

Good question. My rule of thumb is to keep the feet per second (FPS) < 400 for any projectile I use. The faster the FPS, the faster the bolt moves forward and then slams back. From following the experience of others on RU-vid and Facebook that have reported bolt pin issues, they were usually exceeding 400 FPS and/or they were using greater than 850 PSI on the HPA tank. By paying attention to these 2 parameters you can comfortably stay in the middle ground.

@granpopo1224 Год назад

@@ScaredyCatTactical hi, say me please with a vks, how many turn from the end, with 8g, for 40joules ?

@ScaredyCatTactical Год назад

@@granpopo1224 Mine is 9 turns from flush and gives around 42-44 Joules

@Antinavlas 9 месяцев назад

Learning so much from all your videos! Some questions I have when you have the time. Would I be safe running the stock Tcp/Fsc spring where my first shot is at 40 joules and then proceeds to drop from there? Also do you know at what point it’s necessary to do a prv delete? I’ve seen some do that mod and others do not. I’m thinking it has to do with using larger than 12 gram co2 or having HPA installed and output pressures greater than 1000 psi (not sure though). Thanks again!

@ScaredyCatTactical 9 месяцев назад

Thanks! My feelings on the VKS spring and PRV delete is that they are optional. They won't give you more power on the first shot but they help conserve air by resetting the bolt quicker. Thus the later shots may be improved especially on CO2 where the air is more limited. If you are comfortable changing the internals, the VKS bolt spring, sear spring, and PRV deleted spring pad are nice reliability upgrades that work in concert.

@Antinavlas 9 месяцев назад

@@ScaredyCatTactical Thanks for the reply! How would changing those internals (sear spring and prv delete) help with reliability? If one were to not do those mods in your opinion would there be enough reliability to still use for self defense? Thanks again for your time!

@ScaredyCatTactical 9 месяцев назад

@@Antinavlas The most common malfunction would be a double shot. That would be 2 projectiles going half speed and half energy. It happens sometimes with the stock springs when shooting over 25 Joules. It could waste your first shot which is the highest power one. Resetting the sear for the next shot is important for reliable firing.

@victoraguilar4607 2 года назад

Thanks for the detailed info. What would be your tuning setting for a vks shooting 8g jules in fps?

@ScaredyCatTactical 2 года назад

You're welcome. I keep my VKS at around 40 Joules as determined by the X-radar chronograph. It hits hard enough and I can run a 13 ci tank (3000 PSI) at 850 PSI output and get a 2-3 mags of shots out of it before having to refill by hand pumping.

@victoraguilar4607 2 года назад

@@ScaredyCatTactical Thank you for the response. I'm shooting the 8g jules @ 344 fps using an FX chronograph wich = to 40 joules. Thanks again.

@petermulders1501 2 года назад

With all the talk of springs I'd be interested to understand the effect of the air itself. Z-Ram makes the power pin which is shorter, I'm assuming to let more air into the chamber earlier. We know longer barrels with tighter toleralnces increase fps, so where is the sweet spot?

@ScaredyCatTactical 2 года назад

Too much air flow is bad at some point and that's the take home message from this video. As far as Z-RAM and the power pin, it's been tested by a few folks and uniformly gave worse results than the stock pin. Air loss was unacceptable. Maybe it's better for an FSC with a very long barrel but if you have a VKS or short barrel TCP/FSC don't change it.

@michaelbertrand3725 2 года назад

Can you tell me were to get an after market spring that's like the vks or can you give me the specs on the vks spring so I could go to a hardware store and try to find one because I was thinking the same thing about the spring slowing down the bolt and wondering how is that beneficial but I didn't know that the bolt could hit the barrel that way

@ScaredyCatTactical 2 года назад

Great question. I will make a video to go over this since I think others may want to see the numbers in comparison. The main difference is the number of coils (8-9) vs. 11 in the TCP/FSC. That alone makes it stronger. Everything else is very similar to the eye. However, I need to get a caliper and test it fully before giving out other measurements. Stay tuned.

@michaelbertrand3725 2 года назад

@@ScaredyCatTactical cool great idea this helps a lot of people who need this information to defend themselves and their family I hope you know it's pretty cool what your doing

@psi.defence.channel 2 года назад

Solid theory. I thought the same thing. But in practice we've found slightly different findings. I originally abandoned the PRV delete because the bolt wasn't reliably resetting against the back pressure without the prv. Then when I finally noticed the vks without a prv and a different bolt spring, I realized that pepperball did the math for us! We were barely able to see a measurable difference only using the different spring, but with the spring and PRV delete we got an average of 15fps gain. The firing bolt also goes into the end of the breach (barrel). No real risk of collision. I believe most bolts breaking are mostly a result of loose firing pins at high FPS.

@ScaredyCatTactical 2 года назад

My bolt in the example I show will NOT fit cleanly inside the breach of my Grimburg barrel. It scratches against all sides if I insert without the spring. So the slightest of misalignment would only make that worse. The math is good as long as you stay within the specs they advertise, which is around 28 Joules.

@maxhauler 2 года назад

Ah yes. I can see how the PRV is critical to the bolt reaching the sear, especially with increased source pressure. Obviously all of this is a balancing act too .. and I guess the conclusion then is that you CAN delete the PRV, but then you definitely need a stronger spring. End result without PRV is an air chamber pressure that matches the regulated pressure, as high as you want it (before things break lol).

@maxhauler 2 года назад

@@ScaredyCatTactical ok very important to remember this. makes sense with those barrels fitting the ammo tighter. I actually use the .690 barrels a lot. Those were what was available and I realize they let a bit of air rush past the ball .. but I guess when I run those barrels I have less concern about letting the bolt fly farther forward. I have not seen any bolts hit barrels yet, but I HAVE ONLY BEGUN TO TRY TO BREAK STUFF!

@ScaredyCatTactical 2 года назад

@@maxhauler I haven't broken a bolt yet but I have seen numerous videos with broken bolts from others more willing to push the limits. That's usually at around 1100 PSI. I should test my stock barrel, but my Grimburg barrel will not allow the bolt to enter without significant contact on every side. Don't believe anyone that implies there aren't limits to safely using these. If you exceed 1000 PSI with the VKS you are increasing the damage risk. Best results seem to be somewhere between stock 850 and 1000 PSI.

@maxhauler 2 года назад

@@ScaredyCatTactical Good to know. I have a Ninja with the SHP Pro V2 set at 950, and I am excited to try it. Some day perhaps I will set it to the full 1100 (the max the SHP tank regulator can do) but I will work my way up to that and be trying other mods in the process, so I can see different effects and keep track of cause-effect etc.

@jeffdavis3335 2 года назад

I've just realized a possible issue with the grimburg barrel to get the set screw that holds the barrel in snug enough is causing a slight miss alignment causing contact with the bolt ..reaming the back end will help with this issue I noticed scratches on the bottom of the barrel and the bottom of the bolt meaning the back end is tilted slight up when securing the barrel with set screw ...thoughts?

@ScaredyCatTactical 2 года назад

It sounds very logical and could contribute as well in combination with the bore being so tight there. I also find that my safety mechanism doesn't always work when the Grimburg barrel is inserted. For whatever reason, about a 1/3 of the time it is jammed in the on position. I never bothered to ask anyone about it but loosening the set screw slightly generally helped. Also after firing a few shots it usually seemed to start working again.

@jeffdavis3335 2 года назад

@@ScaredyCatTactical the upgraded trigger from instinct industry is worth the money Takes the slop out and the safety is tighter stock makes the safety too sensitive and is a safety issue for me ..pluss it looks nice and feels better ..pistol grips can also have side effects squeezing the grip too much

@HPAtactical 7 месяцев назад

has anyone tried running two springs? one shorter but much stiffer spring inside the main spring that acts as a fail safe so bolt womt hit.the barrel?

@ScaredyCatTactical 7 месяцев назад

The VKS spring is plenty strong and I've never heard of anyone wearing one out (yet). I've tried a little stronger spring and it's no good. The VKS spring is about right. The bolt always goes into the barrel a couple millimeters on each shot. A strong spring is essential to keep the barrel straight and prevent wobble and damage against the barrel. The wobble is also what facilitates the firing pin to come loose if it's not locktited. Even then with too much pressure and FPS, the pin can come loose. There is no perfect fix for those who want to abuse the launcher by going over 50 Joules.

@stevenmeansphotography3861 2 года назад

Question with the orb delete give me more power with my Fsc

@ScaredyCatTactical 2 года назад

I answered the other similar question about the PRV delete. If you need anything else, don't hesitate to ask. Take care.

@jeffliles1044 2 года назад

I tried adjusting the volocity and now it leaks air where the adjustment is what do I do to fix it

@ScaredyCatTactical 2 года назад

There is a pressure relief valve (PRV) in the middle of the spring pad which can be assessed through the middle of the velocity screw. It's a screw within a screw. You need to use a smaller Allen key to turn it clockwise until the leaking stops. Best results are when it is closed but don't over-tighten it because that's not good either. Best long-term results are to do the PRV deletion by plugging the spring pad so that it is always closed.

@sdresden5393 Год назад

Is there any provider of a dependable VKS platform for home defense that you would recommend sir ? From the information I have gathered the AR platform in less lethal is considerably fragile and or “handler hard.” And as such, not worth the investment and certainly not the risk at all imo.

@ScaredyCatTactical Год назад

The point of this video was just to caution that the spring vs. bolt dynamic has it's limits. Some people want to debate this reality but it does come into play if you push the limits of the tolerances. In my opinion, if you run a strong spring (like the VKS spring) and tune it to 40-50 Joules, the VKS is a very reliable platform. If you want 80-100 Joules you are asking for trouble! You just have to check the firing bolt set screw on each service and make sure it's still tight. Mine hasn't unscrewed yet since it was done properly in the factory. Some folks have had problems with their VKS screw right out of the box. But yes, overall these launchers do require preventive maintenance and more TLC than a firearm but they have their legal and practical advantages too.

@sdresden5393 Год назад

Duly noted. I appreciate your rational, honest and practical response.

@GordonClark-sv6pn 8 месяцев назад

Why is my FSC paperball marker blowing air out the back of it. It has a new nil sig o-ring in the end of the bolt. Also I have two o-rings on the back of the bolt and when I charge the CO2 all the air immediately releases out the back

@ScaredyCatTactical 8 месяцев назад

Air leak out the back is typically from the pressure relief valve (PRV). There is a screw within the velocity screw hole that needs to be tightened down. Many delete that screw and replace it (PRV delete). You don’t need to disassemble and my TCP internals video shows the PRV and the spring pad that may need service in your marker. Hope that helps.

@GordonClark-sv6pn 8 месяцев назад

@@ScaredyCatTactical I deleted the PRV on my m17 but how do you delete it on the FSC.? I have just the piston with the spring tightened all the way down. And the other end I took out the spring and ball bearing as well

@ScaredyCatTactical 8 месяцев назад

@@GordonClark-sv6pn Sounds like you definitely deleted the regulator function by removing the ball valve. I generally don't recommend that since you only have totally unregulated air and it's impossible to power tune for optimum number of shots per CO2 cartridge. With it deleted, the PRV is forced to do a lot of extra work and probably can't hold. It involves removing the stock screw that's in the spring pad and replacing it with teflon tape and a new solid screw of the same size.

@GordonClark-sv6pn 8 месяцев назад

@@ScaredyCatTactical if I can get 5/6 shots at full power with 12g CO2 I'm happy.

@ScaredyCatTactical 8 месяцев назад

@@GordonClark-sv6pn You should be able to achieve that with your setup. Just delete the PRV and I think it should be ok. While you have the spring pad out, check and lube the o-rings with some heavy First Strike laceration grease so the area is very air-tight.

@stevenmeansphotography3861 2 года назад

Question will the prv v delete give my Fsc more power

@ScaredyCatTactical 2 года назад

Yes and no. The PRV delete will help conserve air throughout the mag so yes the later shots in the mag will retain more power with less drop off. It doesn't really increase the overall average amount of air that you have but it helps you use it more efficiently. I hope that makes it clearer. I like it. It's not hard to plug the spring pad yourself with the right size screw and some teflon tape.

@stevenmeansphotography3861 2 года назад

@@ScaredyCatTactical so I will not get an increase in Fps on the first shot

@ScaredyCatTactical 2 года назад

No the first shot will be the same. It’s primarily an efficiency mod. I don’t see any difference and there’s no theoretical reason why it would give more power up front.

@stevenmeansphotography3861 2 года назад

@@ScaredyCatTactical ok thanks

@ScaredyCatTactical 2 года назад

@@stevenmeansphotography3861 Your welcome. Any time.

@KC_2112 Год назад

I have the VKS spring in my FCS, T8.1 and my T8 with tons of rounds shot and not one problem. If you are breaking bolts or firing pins you’re not doing proper maintenance to your launcher. The smartest thing to do is take your bolt out and loctite the firing pin or replace it with a stainless steel one then loctite it. The reason that pin snaps is because it comes loose and cocks just slightly and on a fire snaps. So if you’re doing your routine maintenance things like this will very rarely happen. Like I said I’ve thrown a ton of ammo through mine with zero issues with bolts, pins or springs. When you turn those launchers up and fire them it’s pretty violent kick for an air gun so yes things will come loose I can’t stress maintaining these things enough. You take care of it it will take care of you when the time is ever needed.

@ScaredyCatTactical Год назад

I haven’t had one problem either but I check and do regular maintenance like you say. My firing pin set screw did back out once (in a video) and I locktited it back. Big issue are 1) the spring wears too and 2) some barrels are tighter bore than others. It’s rare for the pin to loosen but the bolt does contact the barrel regularly at high velocity. When the spring gets weak there’s more lateral movement and more G-forces on the pin which has a weak spot and can shear off.

@KC_2112 Год назад

@@ScaredyCatTactical absolutely no signs of any of my bolts hitting the barrel in any of my launchers with the VKS spring. Like I said I e put 1000’s of rounds through my launchers I shoot and test daily so I’ve put them through their paces trust me when I tell you this. As a matter of fact I haven’t heard anyone having the problem you’re having. After EVERY single day I’m done shooting the launcher gets completely stripped down and gone through checking every screw, spring and o-ring for any wear and tear or any loose screws. It gets completely checked and cleaned and reassembled for the next day or the day after. I usually don’t go more than 2 days without shooting my launchers.

@ScaredyCatTactical Год назад

Do you have a Grimburg barrel? Those are the biggest concern because of the tight bore. My bolts all wear from rubbing the barrels. That’s normal…to a point.

@KC_2112 Год назад

@@ScaredyCatTactical your bolt NEVER touches the barrel it’s ALWAYS in the spring and the air chamber don’t move. You’re giving people false info and you shouldn’t be doing that unless you really know how these work.

@ScaredyCatTactical Год назад

@@KC_2112 Wrong. The bolt goes into the breech fast and quick. Everyone knows this. Please don't spread false information.

@xpy1 2 года назад

I’m confused

@ScaredyCatTactical 2 года назад

I put a lot of details in the description for everyone. Hope that helps. It’s a complex topic but bottom line is too high PSI and fully compressed bolt spring is high risk for collision, especially with a Grimburg barrel because of the tighter bore at the breach vs stock barrel.