Hey y’all, I’m new to the forum and wondering if I could get some insight into some questions I’ve been pondering over a project.
I’ve recently acquired an M1 sporting special and noticed it has the same 2 circular opening at the front of the receiver that the M4 has. The m4 needs those openings for the gas pistons to cycle the bolt, but why on earth would an M1 need those openings?
The second question I was wondering is what stops the bolt in an m4 during its rearward movement? In my M1 I’ve found that the plunger in the recoil tube “bottoms out” on the recoil tube cap nut which stops the rearward movement of the bolt. The bolt doesn’t directly contact anything in the receiver to stop its movement. The plunger in an m4 is very small and doesn’t bottom out at the end of the recoil tube, so what stops the bolt? Does the bolt in an m4 directly contact something in the receiver to stop its rearward movement?
any input is much appreciated!
thanks,
Taylor C.