Custom Built AR-10 on FDE Aero Precision Lower and Receiver Criterion Barrel - (10180-HYR Chromoly Vanadium / Chrome Lined, 18", 1-10 Twist .750 gas - rifle length. TriggerTech Trigger - Adaptable Primary Trigger (Adjustable) POF-USA Ultimate Direct Impingement Bolt Carrier Group SOLID MACHINED ALLOY STEEL - Nickel Boron. No Staked Gas Key. POF-Roller Cam Pin High Phosphate Nickel Coated with Chrome Plated Bolt Stainless Steel Gas Inlet Tube - Pressed & Pinned into Solid gas key. LPK - Battle Arms Development - Bolt Catch: EBC-Enhanced Bolt Catch), Selector Level: BAD-CASS-SA Comat Ambi Safety Selector - Standard / Short Gas Block - Aero Low Pro POF: Ambi QD Endplate Pistol Grip - Magpul MOE-K2 (FDE) POF Buffer Tube Stock - Magpul PRS Gen 3 (FDE) Charging Handle - Radian Raptor - (FDE) All Springs - CS Conversion Sights - Troy Industries Folding Battle Sights (FDE) Muzzle Device - MZLMAX (Maybe something less expensive until MaxFlo3D) ***POF 3-Chamber Dynamic Muzzle Brake & Jamb Nut Kit)