BCM 14.5 inch hammer-forged midlength barrel with BattleComp 1.5, DD 12 inch Lite rail, Magpul MBUS, DD BCG, Larue handstop, Aimpoint H1 on a Larue Absolute cowitness mount. BCM lower with Magpul furniture and a Geisselle SSA trigger. It's awesome and the BattleComp makes the muzzle barely move-- but it's LOUD.