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Mfg Item #: ATI15MS450BM
American Tactical .450 Bushmaster Complete AR-15 Upper is 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. 100% Made in the USA and Assembled in Summerville, SC.
| Type | Complete |
|---|---|
| Twist | 1:24" |
| Series | Upper |
| Sights | None, Optic Ready |
| Caliber | 450 Bushmaster |
| Handguards | 15" Keymod Rail |
| Barrel Finish | Black Nitride |
| Barrel Length | 16" |
| Barrel Length Range | 16" to 16.99" |
| Receiver Description | 7075-T6 Aluminum |