ATI Milsport AR-15 Complete Upper 5.56x45mm 16" Barrel with 15" M-LOK Rail, Black - ATI15MS556ML15

Complete AR-15 upper receiver assembly featuring a 16" 5.56x45mm steel barrel with black nitride finish and 1:8" twist rate. Includes 15" free-floating M-LOK handguard, phosphate bolt carrier group, charging handle, low-profile gas block, and flash hider. Compatible with any mil-spec AR-15 lower receiver for quick assembly.