Had a jam at a match today where my bolt went back and would not come forward, charging handle wouldn't release it. Percussive maintenance (quick rap to the side of the stock) shot the bolt home, I fired a few more rounds without trouble but I timed out of my stage.
Back at the bench, went to work the bolt and it stuck half way open.
Field stripped it, didn't see anything obvious, lubed it and finished the match.
Hoser suggested a weak buffer detent spring, or a sheared hammer pin.
Detail stripped and cleaned.. nothing amiss except a chip on the buffer tube?? The stock had a tiny bit of wobble, I turned the tube about a 1/16 of a turn and tightened the stock screw tight as it would go.
Nothing looks obviously broken. Can see where it bound up but not why. Clearly the carrier hung up on something.. no debris, no blown primers. No springs bent or damaged that I can see.
Could it be I just need new springs?
PS the bright sots on the top of the lower were there previously, the new marks are on the lower just above the rear take down pin.
Back at the bench, went to work the bolt and it stuck half way open.
Field stripped it, didn't see anything obvious, lubed it and finished the match.
Hoser suggested a weak buffer detent spring, or a sheared hammer pin.
Detail stripped and cleaned.. nothing amiss except a chip on the buffer tube?? The stock had a tiny bit of wobble, I turned the tube about a 1/16 of a turn and tightened the stock screw tight as it would go.
Nothing looks obviously broken. Can see where it bound up but not why. Clearly the carrier hung up on something.. no debris, no blown primers. No springs bent or damaged that I can see.
Could it be I just need new springs?
PS the bright sots on the top of the lower were there previously, the new marks are on the lower just above the rear take down pin.