M14 Trigger group failure

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KeNd0

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I put 3 rounds through my shorty and the TG failed. Took it home, looks like the hammer pin was too short and the mainspring housing would slip out of place to the right and get jammed. I could use a screwdriver to slip it back into the notch in hammer, but a couple of shots later it would do the same. North Sylva wouldn't just replace the TG, they wanted the whole gun, so I had a new pin made and this time I got 20 rds down range before the same problem occurred. What am I missing? Should I just buy a USGI TG?

Some background. It was the stores last shorty. I knew it had a very tight safety when I bought it. Took it home and ran it back and forth until it loosened up. Then I took it to range, failure. It had to come apart to repair, so I polished back area thinking excessively rough machining marks were causing gritty safety. Put back together, function test. Noticed after four or five dry fires the right side would start to creep off of main pin, staked it and returned to range, failure. Brought to store.
They had new pin made and installed, took to range, failure.

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You can see here #12 the notch where it should be sitting and the tension pulling at #11
 
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You could try staking the pin before replacing the trigger group but this is very unusual. I've never heard of this happening. Any chance that you could post pics or the TG and pin area?
 
In a similar vein. . .I was at the range today with both my shorty's and was just test firing the new one I had just bought. First time out with the gun, and magazines would not seat themselves no matter how hard I tried jamming them in the pin would not snap and grab the mag. Finally pulled the trigger group out to have a look at it and the lever that clips the mags in has a hollow rivet running through it that had crumpled on one end and was causing the lever to be bent on one side making the mags fail to seat. Pretty surprised as this was a brand new Norinco first time to the range.

Took to Wanstall's and they had nothing helpful to say except to contact some sort of online gunsmith in Vancouver (??) (after spending upwards of $2k there I wasn't that pleased to be honest thinking this was a pretty easy fix and was hoping to get a rivet or whatever from them and a good pep talk or something. . .anything).

Took it to a hardware store where I found an aluminum rivet that "just" fit. I went home and drove it through the existing hole to fill in the collapsed part of the rivet. Mags sit fine, but not sure how long this fix will last--especially being an aluminum rivet. . .and now after reading this post I wonder if other problems with the trigger group will arise. Maybe I shouldn't have bought two of these things :(
 
seagonus said:
In a similar vein. . .I was at the range today with both my shorty's and was just test firing the new one I had just bought. First time out with the gun, and magazines would not seat themselves no matter how hard I tried jamming them in the pin would not snap and grab the mag. Finally pulled the trigger group out to have a look at it and the lever that clips the mags in has a hollow rivet running through it that had crumpled on one end and was causing the lever to be bent on one side making the mags fail to seat. Pretty surprised as this was a brand new Norinco first time to the range.

Took to Wanstall's and they had nothing helpful to say except to contact some sort of online gunsmith in Vancouver (??) (after spending upwards of $2k there I wasn't that pleased to be honest thinking this was a pretty easy fix and was hoping to get a rivet or whatever from them and a good pep talk or something. . .anything).

Took it to a hardware store where I found an aluminum rivet that "just" fit. I went home and drove it through the existing hole to fill in the collapsed part of the rivet. Mags sit fine, but not sure how long this fix will last--especially being an aluminum rivet. . .and now after reading this post I wonder if other problems with the trigger group will arise. Maybe I shouldn't have bought two of these things :(
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Sounds like you need a new roll or spring pin for your mag catch .It will be a metric size on the Norinco. The Chinese pins tend to be very soft and often deform when removing.
 
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