Okay I'm getting ready to install my timney trigger tomorrow I also have kns anti roll pins. I was curious if there was and tips or trick to installing this setup cause of the polymer frame? Like how much do I snug the set screws? If its too light won't the set screws back off after while?

Simply follow the instructions that come with the Timney. Don't worry about the frame being polymer vs. aluminum. This isn't a toy and the receiver isn't fragile. Snug the set screws so they are tight. Just don't try to force them through the bottom of the receiver or try to snap off your wrench and you will be ok.

If I recall properly, when I installed my Timney in my AR, the set screws had a dab of blue threadlocker on them. This will keep them from ever working loose. Also, the two small cap screws for your hammer pin will also have small dabs of blue threadlocker on them which will keep them from coming loose. The 'keeper' that goes from the trigger pin to the hammer pin will keep the hammer pin from falling out.

Thank you I appreciate it just wasn't sure how tight to go on the set screws mainly.

Just so you know, the anti-rotational feature of the KNS pins will serve no purpose with the Timney, other than 'looking cool'. They will only serve to keep the Timney from moving or falling out. The Timney has a set screw that you tighten to force the drop-in group up tight against the pins to keep it in place, and to keep the pins from falling out. The stock pins are held in place by the hammer & trigger springs on a stock FCG. The springs in the Timney do not interact with the pins.

This drop in FCG does not 'use' the trigger or hammer pins. The FCG is self contained and the components (i.e. the hammer & trigger) don't rotate on the pins. You could use 1/8" wooden dowels for pins and the FCG would still function.

I would have to disagree with you on this some. You state do not worry about the polymer frame, yet a buddy warped his by installing his Timney trigger. Now - I would agree that he could have done it with more attention and detail, but he lost 4 pins by just "doing it enough". Finally, he got annoyed and gave the set screws an extra turn too much. This warped the frame and you can see screw protruding through plastic frame.

What I did on mine was tighten the screws so there was firm pressure and then installed the KNS pins to prevent them from falling out.

Before getting the KNS pins, I did tighten the set screws to support the pins. Yet, I did not use Loctite. After about 400 full-auto rounds through the 15-22, I lost a pin on the range. Thats what prompted me to buy the KNS pins. Cheap insurance and has safed me a bunch of potential issues.

Mike

Exact same for me Mike

Tried without KNS Pins... after about 500rds FULL AUTO... they where sliding out

Actually put tape over em the next time out until my KNS pins arrived.. It worked fine till i got it setup with the KNS pins


do it right the 1st time.... I have learned 2x now...LOL


Stav

One more question when I removed the saftey a small brass pin and a small black plastic pin fell out any ideas where these came from?