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The ATI 15MS450BM, a Complete AR-15 Upper from American Tactical, provides a ready-to-use, drop in assembly boasting a 450 Bushmaster chambered barrel. This superb piece features a 16" barrel equipped with 1:24 button cut rifling and a resilient black nitride finish. The sturdy upper receiver is Mil-Sport AR-15 patterned and is forged from aluminum for maximum durability.
The unit is elegantly finished with a 15" aluminum free-floated key-mod rail system situated over a carbine-length, low-profile Dgis gas system. It boasts an A2 style compensator, contributing to its overall performance. The assembly is also fitted with a black nitride finished bolt carrier group for extra resilience.
Designed to fit any AR-15 pattern lower receiver effortlessly, this assembly guarantees seamless integration with your existing unit. The ATI 15MS450BM is proudly 100% American made, with assembly completed to perfection in Summerville, SC.
This drop in ready upper receiver assembly features a forged aluminum Mil-Sport AR-15 pattern upper receiver with a 16 barrel with 1:24 button cut rifling and black nitride finish chambered for 450 Bushmaster. Completed with a 15" aluminum free floated key-mod rail system over a carbine length low profile Dgis gas system A2 style compensator and black nitride finished bolt carrier group. Fits to any AR-15 pattern lower receiver. - 450 Bushmaster Caliber - 16" Black Nitride Barrel - 7075-T6 Forged Aluminum Upper Receiver - 15" Free Float Key-Mod Rail System - Low Profile Carbine Length Gas System (DGIS) - A2 Style Compensator - Black Nitride Finish Bolt Carrier Group
