Colt Big Pin FCG Upgrade

iraiam · November 26, 2016, 07:29 PM

I have an old Colt Match Target HBAR that I have made several upgrades to. I wanted a new "Match Grade" FCG, but found that the availability of the 0.170" "big pin" parts are far less available than they used to be.

The answer was the STBA™ AR15/M16 STAINLESS TRIGGER BUSHING & HEX HEAD PIN ASSEMBLY (no link provided due to forum rules, google it if you are interested).

I was able to install this kit using only a mini-mill and basic machining skills. after the install I was able to drop in the RRA two stage varmint kit and it works perfectly.

The bushing holes were precisely drilled and tapped for 1/4-40 threads, the bushings are threaded in with locktite and tightened.

November 26, 2016, 07:29 PM	#1
iraiam Senior Member Join Date: September 6, 2012 Location: Lakewood, CO Posts: 1,057	Colt Big Pin FCG Upgrade I have an old Colt Match Target HBAR that I have made several upgrades to. I wanted a new "Match Grade" FCG, but found that the availability of the 0.170" "big pin" parts are far less available than they used to be. The answer was the STBA™ AR15/M16 STAINLESS TRIGGER BUSHING & HEX HEAD PIN ASSEMBLY (no link provided due to forum rules, google it if you are interested). I was able to install this kit using only a mini-mill and basic machining skills. after the install I was able to drop in the RRA two stage varmint kit and it works perfectly. The bushing holes were precisely drilled and tapped for 1/4-40 threads, the bushings are threaded in with locktite and tightened. __________________ NRA Lifetime Member Since 1999 "I ask, sir, what is the militia? It is the whole people except for a few public officials." George Mason

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