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Posted: 6/11/2014 6:35:36 PM EDT
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Someone has probably tried or thought of it but here is goes anyway. Why couldnt you use compressed air with an adjustable valve and piston to dampen the cycling bolt in an AR? Like a shock absorber but built so the bolt pushes back into a tube filled with air. Maybe similar to how a pellet gun works. It would be lighter
Just late night brain wandering thoughts after reading ARFCOM. AL |
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Quoted:
What if we ran the gas tube further back and also dumped some gunpowder gasses into the buffer tube and retarded the bolt open for a 2nd time?  Unless you can somehow delay the gas going thru the rear (pun intended), the carrier would be stuck and not move since it's being gassed up front and in the rear. Wait, you can delay the rear gas with a valve and a spring. Plus, you don't want your face anywhere near those hot gases if there is a leak. |
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Aside from possible leakage and friction, one other issue with using a gas spring.
P1 x V1 = P2 x V2 If you replace the buffer, and everything in the tube, and the piston was fairly thin, you would be taking the volume to roughly a third of it's original when the bolt travels rearward. That means that the spring rate would be basically linear, but very steep, as in it might take 5 lbs to start charging the bolt, but 15lbs to completely retract it. Now if you're talking about keeping the spring, and simply using a gas damper to reduce the felt recoil and bolt bounce, that's a different story, but still a potential failure point. |
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Originally Posted By Hail Mary:
Unless you can somehow delay the gas going thru the rear (pun intended), the carrier would be stuck and not move since it's being gassed up front and in the rear. Wait, you can delay the rear gas with a valve and a spring. Plus, you don't want your face anywhere near those hot gases if there is a leak. Originally Posted By Hail Mary:
Quoted:
What if we ran the gas tube further back and also dumped some gunpowder gasses into the buffer tube and retarded the bolt open for a 2nd time? Unless you can somehow delay the gas going thru the rear (pun intended), the carrier would be stuck and not move since it's being gassed up front and in the rear. Wait, you can delay the rear gas with a valve and a spring. Plus, you don't want your face anywhere near those hot gases if there is a leak. That's ok, we hate lefties anyway - run it down the right side.
The gas to the rear IS delayed - by the time it gets to the back it's already started the BCG moving. Particularly if you have a piston system up front. And there's far more volume for the tapped gas to fill than in BCG or in a piston cylinder. |
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You mean this?
Olympic Arms Pneumatic Recoil Buffer - Adjustable |
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