You have to try one of these P.O..F triggers.

I have a Timney 3lb in my Windham AR and it is nice and good. Real pain to install with those small set screws. Then I came across the POF 4.5 lb on sale at Christmas at super price and ordered it. I am so glad it was on sale otherwise I may not have purchased it. So much easier to install and it came with the anti rotate pin kit included in the package. That is a $30 savings. I tried the trigger in my Core 15 and was absolutely blown away on how good it felt. It put the Timney to shame. It is much crisper no take up no over travel and great reset. The clean crisp break just far out ways a lower 3lb pull of the Timney. It really feels like 3lb or better due to the crisp break. I love letting people pull the trigger on this POF and they are flat out surprised. This trigger gives such better accuracy. Go for it...you will not be dissatisfied and you will save some $$$ over the competition with the anti rotate pins included. I bought a second one for my son-in-law and he is a CMC user. Well he is a POF patron now.