The BAD Authority Elite upper receiver features a precision-machined billet 7075-T6 aluminum receiver with integral ambidextrous controls and a 16" chrome-moly steel barrel in 5.56 NATO.BAD Authority Elite AR-15 Upper Receiver Assembly16" 4150 chrome-moly steel barrel with black nitride finishBillet 7075-T6 aircraft grade aluminum receiverFree-float M-LOK handguard with attachment points at 3 6 and 9 o'clockFull-length Picatinny rail at 12 o'clock positionAmbidextrous charging handle (BAD Rack-15 C)Complete AR-15/M16 bolt carrier group includedBlack anodized finishThis complete upper receiver assembly delivers exceptional durability and accuracy for AR-15 builds featuring ambidextrous operation and the versatile M-LOK mounting system for accessories and optics.