I am just starting my first build....I already have an S+W Sport with Magpul furniture, Midwest Ind. 12 handguard, Trijicon TA31F ACOG, Spike's trigger guard, Troy medieval muzzle break and Larue 3.5 trigger upgrades.....and an HK SL8-1 setup with Nikon .223 optic...but the allure of building my...