Here's the stock and trigger I'm using on my custom build.
CAA Sniper stock
http://www.midwayusa.com/product/825353?cm_vc=S014
Geissle SSA two stage trigger
http://www.midwayusa.com/product/247...wo-stage-matte
I love ARs but customizing can get expansive quick. I've got about $2,500 into one of mine and about $1,800 of that is upgrades and accessories lol.