Aero Precision M4E1 lower with 16" 300 aac heavy barrel. 5/8-24 threaded muzzle with flash hider. Side charging upper receiver. Free float mlok handguard, Upgraded stock. Only shot a few rnds, works flawlessly. (Optic, light, buis, foregrip and sling not included.) Meet in Bulverde, just North of San Antonio with a TX ID. 210-878-675two. Thank You