So far I replaced my Titanium firing pin and extra power firing pin spring with a more original setup. I also changed out the mainspring, mainspring cap, mainspring retainer pin, and the mainspring cap pin. I used a Wolff mainspring, Wilson bullet proof firing pin, and the rest of the parts are all Colt factory parts. I also ordered a Wolff 16 lbs. recoil spring but I ended up with a 10 lbs. spring. So I'm still waiting on the 16 lbs. Next is going to be grips, a Kings grip safety, Wide spur hammer, and matching sear and disconnect.
BTW, mine is a GI model.
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