The Bushmaster 0040004BLK M4 Patrolman's Upper delivers a classic XM-15 style upper receiver group built around a 16" black nitride barrel and forged 7075-T6 aluminum receiver. This complete upper includes an A4 flat top receiver with detachable carry handle, M4 profile handguard, and an A2 birdcage-type flash hider, giving shooters a dependable, patrol-inspired configuration for their AR-platform build.

This upper is chambered in 5.56x45mm NATO with a 1:9" twist and carbine-length gas system, making it well suited for range use, training, and general-purpose carbine setups. Fixed A2 front sights paired with the carry handle rear sight provide a familiar sight picture, while Bushmaster's proven XM-15 lineage underscores reliability and consistent craftsmanship.

• Manufacturer: Bushmaster
• Model: M4 Patrolman's Upper / XM-15 Upper
• Caliber: 5.56x45mm NATO
• Barrel Length: 16"
• Barrel Finish: Black Nitride
• Receiver Material: 7075-T6 Aluminum
• Gas System: Carbine Length