Those would be my two guesses. Either a drilled controlled reciprocating bolt or straight blowback with a spring tuned for a certain setting on the drill.
Yeah, I was also thinking just regular blowback at first, but it doesn’t look like this system would actually be able to strip the round from the belt to fully chamber it (it looks like spent casings still on the belt in the photo), so I’m guessing the round is being pushed into the chamber with just enough headspace to seal to fire the bullet, and I don’t think that would actually send the bolt backward to cycle it.
I’m kind of surprised the casing would be able to handle that kind of pressure without just exploding with no barrel around it, if that’s the case. I guess .22lr is either just underpowered enough, or maybe the slots in the belt are reinforced somehow.
Those would be my two guesses. Either a drilled controlled reciprocating bolt or straight blowback with a spring tuned for a certain setting on the drill.
Yeah, I was also thinking just regular blowback at first, but it doesn’t look like this system would actually be able to strip the round from the belt to fully chamber it (it looks like spent casings still on the belt in the photo), so I’m guessing the round is being pushed into the chamber with just enough headspace to seal to fire the bullet, and I don’t think that would actually send the bolt backward to cycle it.
I’m kind of surprised the casing would be able to handle that kind of pressure without just exploding with no barrel around it, if that’s the case. I guess .22lr is either just underpowered enough, or maybe the slots in the belt are reinforced somehow.
Well 22LR is rimfire, so, just a well-angled impact could set the round off