The AR-Stoner T-Series AR-15 Upper Receiver Assembly is ready to be assembled to a complete lower and fired! This billet upper features a bolt carrier group, a barrel and an Slim free float M-Lok handguard. Securely mount popular accessories directly to the precision M-Lok cutouts. This sleek and ergonomic free float handguard meets shooters needs without sacrificing strength and performance.The A3 upper assembly comes complete with charging handle, forward assist, ejection port cover, flash hider, bolt and bolt carrier assembly. Supplied without sights, this upper is a great platform for a precision scope or iron sights (both sold separately). FeaturesBolt Carrier Group, Nitride finish, HPT/MPISlim Mlok Free Float Hand GuardMil-Spec Charging Handle Alum.Dust CoverForward AssistA2 bird cage flash hider