ATI MilSport Complete Upper | .450 Bushmaster | 16in | ATI15MS450BM

The American Tactical (ATI) MilSport complete upper is a drop-in ready AR-15 pattern upper chambered for .450 Bushmaster. It features a 16-inch barrel with a black nitride finish and a 15-inch free-float forend designed for accessory mounting. This assembly ships with a 5-round magazine and a bolt carrier group finished in black nitride.

Product Specifications

• The caliber is .450 Bushmaster.
• The barrel measures 16 inches.
• The included magazine capacity is 5 rounds.
• The barrel finish is black nitride.
• The bolt carrier group is finished in black nitride.
• The muzzle device is an A2 compensator.
• The assembly fits AR-15 pattern lower receivers.
• The forend measures 15 inches and is free-floated for consistent harmonics.
• The upper receiver is made from 7075-T6 aluminum.
• The overall finish type on the receiver is black anodized.
• This item is sold as a complete upper receiver assembly.
• The sighting setup is optic ready.
• The product includes a 5-round magazine in the package.
• The manufacturer part number is ATI15MS450BM.
• The UPC is 819644020288.

This MilSport upper is suited for short- to moderate-range hunting applications where large-bore performance is required, and for range work where low-maintenance finishes and a drop-in fit are priorities. The combination of a black nitride barrel and BCG with a forged 7075-T6 receiver delivers durable service life and reliable function when used with a properly configured AR-15 lower. 100% made in the USA and assembled in Summerville, SC, the assembly provides a straightforward upgrade path for builders and shooters seeking a big-bore AR-15 upper.