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Posted: 9/18/2013 10:09:40 PM EDT
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Hi everyone, having an issue with my latest AR build and could use some help.
I just finished building a 300 blackup upper and took it out tonight to test it. I put about 4 mags through it with 0 problems. Ran great. But, on my fifth mag, I had a trigger malfunction. After I fired a round, the trigger didn't reset, so when I pulled, nothing happened. The next round *was* chambered, but the trigger just wouldn't do anything. I was able to unstick the trigger (after clearing the rifle) by violently charging it, but it would take a good 10+ times charging before it would unstick. Finally though, I couldn't get it to unstick anymore. So, brought the rifle home, took the upper off, and I can't for the life of me figure out what's going on: The hammer is currently back, but the trigger is stuck. I can't pull it, there's no movement, and I can't push it forward either. I can't move the safety lever. So how in the world do you end up in a situation in which the hammer cocks, but you can't pull the tigger? I tried to do as much searching on this as I could, but almost every result I came across either wasn't my problem (most people can just charge and it works) or, they built their lower. But I didn't build my lower. It's a factory Colt, from a 6933 SBR. This was my first time out with it, but still, factory Colt, brand new. Please help! :) |
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Make sure that you don't have a popped primer or other debris lodged underneath the trigger tail. If you are charging the rifle and the hammer is cocked but the trigger is in the rearward position after manually charging, this is usually the cause, but not the only one. Check it and let us know.
ETA: You will probably have to remove and reinstall the FCG to check though. While you have the components out, you can inspect them for damage, especially the disco. If you need instructions how to do this, let me know. |
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Thank you both!
That's exactly what it was. Popped & blown primer sitting right on top of the grip screw. Would have been faster I guess to pull the grip off instead of the FCG, but of course I didn't know what's where it was until I got the guts out. On the plus side, I got to pull a lower apart for the first time. But thank you both for the help, really appreciate it! Cheers |
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Quoted:
Thank you both! That's exactly what it was. Popped & blown primer sitting right on top of the grip screw. Would have been faster I guess to pull the grip off instead of the FCG, but of course I didn't know what's where it was until I got the guts out. On the plus side, I got to pull a lower apart for the first time. But thank you both for the help, really appreciate it! Cheers The fcg is meant to be taken apart more easily and more often than the grip. Much harder to permanently damage something going the fcg route. Maybe it's just me but I always worry about incorrectly threading the grip screw or stripping the threading. |
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Quoted:
The fcg is meant to be taken apart more easily and more often than the grip. Much harder to permanently damage something going the fcg route. Maybe it's just me but I always worry about incorrectly threading the grip screw or stripping the threading. Good point. Sliding the pins in and out seems relatively dummy proof. I'll keep that in mind. Thanks again for the help! Wish I could buy you a beer. |
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