-Proof Stainless steel 14.5 intermediate gas length 6mm ARC barrel with 2000 rounds on. - Aero Precision upper and lower - Geissele SSA-E trigger - BCM furniture, charging handle, and handguard - JP enterprises bolt - ballistic advantage bolt carrier - dead air keymo brake - Odin works with Arca and Picatinny adapters - 2 17 rd 6.5 grendel duramags. Replaced a worn down firing pin a week ago that was popping primers. Otherwise in good shape. The rifle prints 1.5 moa on a bad day with Hornady black. Great, do all rifles in a great caliber.