BUSHMASTER® XM15™ M4 -E2S .223 REM 16'' Complete Upper

Introducing the M4 from Bushmaster® Firearms, the perfect blend of reliability and performance for duty, defense and sport shooting. This rifle series is handcrafted in America and Proven® to perfection, making it the go-to rifle for those who demand the best. The Heart of Every M4, the Bushmaster® Chrome Lined Phosphate Bolt Carrier Group, a high-quality component designed to ensure smooth and reliable operation for your firearm. This rifle is a staple in every collector's set. Handcrafted in America, Quality Control, and Proven to Perfection. FEATURES & SPECIFICATIONS Barrel: Caliber: 5.56 NATO /. 223 REM Length: 16”, Chrome Lined Material: 4150 CMV, Chrome Moly Vanadium Gas System: Carbine-Length Thread Pitch: 1/2x28 UNEF Twist Rate: 1:9 F-marked A2 front sight Finish: Salt Bath Nitride Bolt Carrier Group: Chrome lined Bolt Carrier, M16 profile Chrome lined Gas Key Machined to USGI specifications Properly staked Gas Key per Mil-Specs Material Bolt Carrier: 8620 Material Bolt: 9310 High Pressure Tested (HPT) Magnetic Particle Inspection (MPI) Superfinished Carrier Body Forward Assist Serrations Finish: Phosphated Receiver: M4/A4 Flat Top Upper Receiver with Brass Deflector & Forward Assist Receiver Material: Forged 7075 T6 Aircraft Aluminum Finish: Mil-Spec Type III Hardcoat Black Anodize Finish INFORMATIONS Compatible with AR-15 MIL-SPEC Lower Receivers Including C.I.P. Compatible accessories see under this article, accessories