Do we think we will see bore evacuators on a lot more rifles in the future?
Posted by Darth_Klaus501@reddit | ForgottenWeapons | View on Reddit | 14 comments
I am aware of them being used on two different guns. The Gemtech GVAC and the PWS UXR. I don’t think the GVAC is supposed to operate fully like an evaluator, more to siphon off extra gas with the DI system I think. However the UXR seems to have a true evacuator and even looks like one found on a tank. Not sure if it really works, but it’s nice seeing innovation in the industry.
Is this technology being used on other guns I am not aware of like machine guns and other rifles domestic and abroad? Given how ubiquitous suppressors are becoming in the military and in the civilian market, it seems it might get more attention or does flow through cans work well enough y’all think?
Piston guns circumvent some gas to the face, but they can’t get rid of the gases coming back down the barrel sadly. I wonder if the new FN LICC IWS rifle has something like an evacuator. It has a self regulating gas system based on the FN website. It’s a gun built from the ground up to be a suppressed rifle. You would think it would try to address some of the gas beyond just making it piston driven.
FeedbackOther5215@reddit
Wouldn’t really work on a semi auto and there’s no point for it on a manual action. It works on artillery/tank guns because of the extreme dwell time. The only semi autos that it could even slightly work on would be long recoil but silencing a long recoil gun brings its own headaches. For an AR or AK the dwell time is so short there’s no time to pull the gas even with an extremely effective evacuator.
Darth_Klaus501@reddit (OP)
That makes sense. But I guess would have to wonder why the gemtech and UXR even have one. Is it just a gimmick? Does it really do anything?
SaltySeaSword652@reddit
In the case of the gemtech it is a bore evacuator designed with that purpose, but it also looks like its been designed with the suppressor in mind. So while it was designed to reduce gas blowback (which is counteracted by the fact that it's still a DI gun), the evacuator also looks to enhance the functionality of the suppressor. Whether this works in rapid fire remains to be seen. The UXR uses essentially the same design, but with a short-stroke piston. It seems to do nothing and the UXR seems quite gassy for a piston gun.
I think for a bore evacuator system like this for work, the gas system and action needs to be designed around it working, and that means delaying the unlock of the bolt until after the pressure in the barrel has dropped and the gases have escaped.
RH762@reddit
Well if the UXR’s evacuator is to prevent suppressor blowback it doesn’t work. I shot one for 5 rounds suppressed at a somewhat slow rate, and the gas was coming out of the receiver gap and directly into my face.
MrSanford@reddit
No, unless you want a gun you can fire from an enclosed space I dont see why they would be needed. Adjustable gas blocks will suffice.
Darth_Klaus501@reddit (OP)
I know adjustable gas blocks are generally discouraged for military rifles. At least highly adjustable. It’s like two or three selections at most. When it comes to burn down videos, that seems to be a major failing point
thatARMSguy@reddit
Are you ever going to shoot a rifle to the point that you’re going to explode an adjustable gas block?
Darth_Klaus501@reddit (OP)
No, just pointing out why they’re not popular for military rifles. They usually tune the weapon specifically for a certain purpose and have all those settings hard set. I like adjustable gas blocks as a civilian and feel they’re very effective and work well enough. But depending on the model, you oftentimes do find them adjusting themselves out of the settings.
Activision19@reddit
No because a bore evacuator on a rifle is a solution in search of a problem. They won’t prevent DI gasses on an AR platform from venting through the receiver and into the shooter’s face and on basically all self loading rifles you will always get at least a little bit of gas back into the action because the barrel still has some pressure inside when the bolt starts to open and break the seal formed by the case. Bore evacuators on tanks are only necessary because of the desire to not fill the enclosed crew compartment with hot toxic gasses from the cannon (of which there is orders of magnitude more of from firing a cannon compared to a rifle) and since you aren’t breathing the air inside your receiver on you rifle, you don’t need one on a rifle.
Darth_Klaus501@reddit (OP)
Well, the point of the evacuator on the UXR is to prevent said gases from going back down the barrel. Whether it works is difficult to conclude. But there seems to be a desire in the market to prevent this. Even with guns that aren’t gas operated, they can belch tons of gas like the MP5.
Activision19@reddit
Well yeah PCCs and sub guns belch a lot of gasses because they are straight blowback (or at least delayed blowback in the MP5’s case), which means they need those gasses pushing the case and bolt backwards in order to cycle the action. A bore evaluator on a blowback gun would work against the blowback principle and siphon off some of the gasses that are necessary to cycle the action…
justaheatattack@reddit
you mean Sniper Assist?
Darth_Klaus501@reddit (OP)
?
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