AR Trigger Pin Walking

[Lumber_Jack]

So, my trigger pin in my AR keeps walking out. It's from a Rock River LPK and it's walked in both my Spikes and now my TGO lower. I've ensured the the legs of my hammer spring are on top of the trigger pin. Is there a chance the pin is out of spec?

[Tobashadow]

Back the trigger and hammer pins out a bit and use a set of micrometers to compare the hole and pin diameter of both.

There's a good chance it's just enough out of spec but id still compare all four of the holes on both lowers for shits. Edited November 23, 2014 by Tobashadow

[173rdABN]

KNS anti walk pins will help solve that.

[Oh Shoot]

KNS anti walk pins will help solve that.

 

Solved it on a 10/22 with high tech dabs of clear nail polish around end of pin on each side.

 

- OS

[Lumber_Jack]

KNS anti walk pins will help solve that.

Yeah I figured. I wasn't sure why they walk though. Is this an issue with the pins, the holes? Has it always been an issue. Is it an issue on military issue weapons?

[whitewolf001]

Slight variances in machining tolerances I believe.

[raildog]

Yeah I figured. I wasn't sure why they walk though. Is this an issue with the pins, the holes? Has it always been an issue. Is it an issue on military issue weapons?

Yes is the answer to all three when i was still in we would put a drop of super glue on them

[Dolomite_supafly]

If you want I can deepen the grooves.

[173rdABN]

I only had one M4 in the Army with bad pins. Was training in Germany in 06' as a grenadier at the time and I would constantly get 2 round bursts from my trigger pin walking out. Couldn't fix it on the spot there. But it was what it was. Didn't really care either, ha. 

 

Anyways, I use KNS pins on all my guns here just so I never have to worry about it. It's not a common problem, but it does occur once in a while. 

[Lumber_Jack]

If you want I can deepen the grooves.

I appreciate it. I'm just gonna get KNS pins

[Lumber_Jack]

KNS anti walk pins will help solve that.

Know anywhere in the mid-state that carries them?

[raildog]

Know anywhere in the mid-state that carries them?

Saw them at On Target in Murfreesboro had two different styles that was Friday of last week think they were $35.00

[whitewolf001]

Mine started to walk out after about an hour or so of switching back and fourth between it and my Scout Squad. I didn't notice it till I went to remove my mag and it was out by about 15% or so, enough to catch my eye.

[Dustbuster]

Outpost armory. Everything weapons cool springs and I think I may have seen them at GnL in greenbrier. I had pins walk in new complete rifles, drove me nuts. New sig 516 pins were walking. They sent new ones. I said screw it even w dual spring hiperfire triggers I run kns kits. That double burst crap sucks....there are oversize pins but I've never tried them.... Edited November 29, 2014 by Dustbuster

[rugerla1]

Saw them at On Target in Murfreesboro had two different styles that was Friday of last week think they were $35.00

Yep, $35. Saw them today while I was in there.

 

Edit: I mis-read that. I was at Outpost Armory and saw them, same price.

Edited November 30, 2014 by rugerla1

[R_Bert]

Is this what y'all are referring to?

 

http://www.amazon.com/KNS-Non-Rotating-Trigger-Hammer-2Black/dp/B005NBUBH8

 

Thanks,

 

Bert  (still learning AR stuff)

[rugerla1]

Yessir

[R_Bert]

thanks

[Lumber_Jack]

Is this what y'all are referring to?

http://www.amazon.com/KNS-Non-Rotating-Trigger-Hammer-2Black/dp/B005NBUBH8

Thanks,

Bert (still learning AR stuff)

Those are Mod 1, there is a Mod 2 version that is more slender through the body.

[Murgatroy]

I like the Mod 2 version myself with the dogbone look.

 

http://www.amazon.com/KNS-Non-Rotating-Trigger-Hammer-154-Diameter/dp/B006FXVK3C/ref=pd_sim_sg_1?ie=UTF8&refRID=1YP26A8X1E8QW2P3DJHK

[Garufa]

If you go with KNS pins do not use loctite on them.