TacFire SSBU55616 AR-15 5.56x45mm NATO 16" Complete Upper - Black Nitride

The TacFire SSBU55616 complete upper is an upper-receiver assembly for an AR-15-pattern rifle. It is chambered for 5.56x45mm NATO, with the action specification identified as 5.56 NATO. This is an upper assembly, not a complete firearm.

Its 16" barrel has a 1:8 twist rate, 1/2x28 muzzle threads, and a black nitride barrel finish. These dimensions provide key compatibility information when selecting ammunition and threaded muzzle components for the assembly.

A black M-LOK handguard completes the configuration and provides an M-LOK interface for compatible accessories. The assembly is offered in New condition.