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Posted: 10/31/2009 10:24:49 AM EDT
| I use to say I had built well over 20 AKs. I think it's safe to say it's over 30 of them now. I don't remember encountering this issue before and I'm hoping somebody knows what's happening. When I rack the bolt carrier to the rear it sometimes gets stuck and I see that the bolt carrier is raised up off the top rail at the full rear position. Pushing down on it allows it to slam forward into battery. I know that the bolt carrier presses down the hammer against spring pressure and racking it several hundred times with lubrication makes it smooth out but this doesn't seem to be what's happening. Any experience with this? Thanks, Bob |
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Sounds like the rails have been cut too far forward.
When the rails at the rear are cut to allow the bolt carrier to snap down into place the recoil spring assembly prevents the carrier from moving so far to the rear that the carrier can pop up out of the cuts. If the cuts are cut too far forward, the carrier can pop up even with the spring assembly in place. Usually the only "fix" is to install a polymer buffer which limits the amount of rearward travel of the carrier. |
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Quoted:
You can also file on the leading edge of the bolt carrier rail guides on the top of the lower edge. It creates a cocked "V" shape that allows the rails to slip into the channel without affecting function. Its a minor fitting issue.. I ordered a buffer from bufer tech. I'm not understanding where you're talking about filing. |
| This just happened to me in august on my first build. Lasted a few weeks until it started to hop out the rail, too bad I didnt know about the buffer fix, I just built another receiver to fix it. But I knew what the problem was and really paid attention when cutting the rail areas |
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Quoted:
This just happened to me in august on my first build. Lasted a few weeks until it started to hop out the rail, too bad I didnt know about the buffer fix, I just built another receiver to fix it. But I knew what the problem was and really paid attention when cutting the rail areas see post #13 at this link http://www.calguns.net/calgunforum/showthread.php?p=3297445#post3297445 |
| What I did was not cut out one of the bolt cutouts on the right side, that was the side that I had cut to long before, and when rebuilding the receiver I saw that cut wasnt needed for my application. I waited until the very end to even cut on the rails and took measurements and went slow. Before I was just cutting the lines on the template not knowing anything. Plus rebuilding I was able to get my selector lever to line up perfectly with the dust cover so there was no gap as I had before. |
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