I just installed the Chip McCormick trigger module and tho I have not fired it yet it seems to be a huge improvement over the stock trigger. The module is a drop in affair, the pins are tight, you have to hammer them in, I used a small gunsmith hammer with a brass or plastic face. Not a ball peen hammer. Also the rear of the module that the safety bears on did come into contact with the side of the lower so I had to remove some metal there but not a problem. Could be my lower is tigher than most, Mega Machine marked Dalphon. The trigger is light and crisp enough for precision work but not too much so for hunting. I am very pleased. Problem is two things, the triggers are not cheap and for the moment there don't seem to be many available. I have the single stage curved trigger in part because that is what was available. http://www.chipmccormickcorp.com/merchant2/merchant.mv