Strange problem (to me that is)

[Dan Wilson]

I had a strange problem on one of my rifles when I fired it for the first time, put in a fresh clip and it would short stroke and eat the fourth cartridge, none of the others, just the fourth.

Long story short it went away when I changed out the op rod catch, why would the op rod catch cause this?

Dan

Information

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[Dan Shapiro]

It's possible the accelerator pad was worn, and started to signal for an early clip latch release.

[Dan Wilson]

Only thing is the clip itself never released, it would just eat that fourth round, and shoot the other seven just fine - crazy

Dan

[Dan Shapiro]

Only thing is the clip itself never released, it would just eat that fourth round, and shoot the other seven just fine - crazy

Dan

A lot of weird thing go on in there during the feed cycle. Remember the "7th round jam"? Just because a guide rib was nicked. Reverse the clip from top round right to top round left and the problem went away. The nick never bothered the 1st 6 rounds. Same instance here. The op rod catch didn't have to totally release the clip latch, just move it enough to alter the geometry. Or other such mysterious voodoo.

Had a case once where a rifle would not fire. Could not pull the trigger. Pulled back the op rod, ejected the round. Rifle would fire. Rifle would fire a couple more times, then, back to the problem. You could not pull the trigger. Drove me nuts. Finally, with the trigger group out, I began thumbing the hammer back over the trigger sear and pulling the trigger. Kept doing this over and over, and at times, the trigger again could not be pulled. Then I noted that the trigger pin was rotating. Pulled the pin out and found by rolling it between my thumb and forefinger, it had a slight bend in it. Replaced the pin and........no more problems.

[Dan Wilson]

Yep, just like the fookin gremlins we used to have on the C-130 all the time

Thanks Dan

Dan

[cruiserdan]

Have you tried reversing the stack? IE top round on the left?

[Dan Wilson]

Nope sure didnt.
Changing the op rod catch fixed the problem and now the rifles in others hands, thanks for the input though.

Dan

[U.S.G.I.]

Now I like happy endings...Thanks Dan Shapiro for another lesson.

Semper Fi...