Colt receiver + Triggertech + TNA trigger pins = pins walking out

[roadcarver]

Hi all,

I recently build a Colt AR-15 lower and equipped it with a TriggerTech adjustable trigger.

For a while the pins were friction fit and did not move. About a week ago when there was a recall on the TriggerTech triggers, I had to remove the trigger from the lower to check whether the SN of my Triggertech was part of the recall, fortunately it wasn't. I assembled everything back and stored it away.

Fast forward to yesterday, I was out in the range and noticed after shooting, I saw a roll pin on my shooting bench.

I noticed that it was the front roll pin to secure the trigger to the receiver. It seemed to have walked out.

The rifle was pointing downrange and I reinserted the front trigger pin from the left to the right. When I placed it back, it was so loose that I was able to press it back in using my fingers.

What could cause this to be so loose. I'm wondering if I installed the pins backwards? Is there a possibility of doing that - I mean is there only one way of inserting the removing the roll pins for the trigger?

Thx for any advice.

 

[Matt K]

The hammer and trigger pins are retained in a trigger tech trigger by tightening the two rear hex screws against the bottom of the receiver which pushes the assembly - and the pins -upward. If you follow the instructions accurately the pins will not walk out.

 

[tony9000]

put locktite on the pins, let them dry, now they wont walk cause theyre thicker

 

[TK-Hryciuk]

put locktite on the pins, let them dry, now they wont walk cause theyre thicker

Not trying to be a #### but that is a bad idea, just like putting loctite on a castle nut and receiver extension threads.

 

[roadcarver]

Oh, I missed that part. Let me read my installation manual again. Thanks for that.

The hammer and trigger pins are retained in a trigger tech trigger by tightening the two rear hex screws against the bottom of the receiver which pushes the assembly - and the pins -upward. If you follow the instructions accurately the pins will not walk out.

 

[roadcarver]

That did the trick! Thanks MattK for that. I checked the TriggerTech manual again and I missed step 5 out of 7 and it did state "Critical and Important".

All tightened up now and the roll pins are not going anywhere.

 

[Matt K]

Glad your back in the game!