TacFire BU5565 5.56mm NATO AR Pistol Upper Assembly - 5in - Black - Upgrade your AR-platform build with the TacFire Pistol Upper Assembly, chambered in 5.56x45mm NATO and designed for compact configurations. Featuring a 5in barrel with a durable black nitride finish, this complete upper assembly offers corrosion resistance and a sleek, low-profile appearance. An A2 flash hider helps reduce visible muzzle flash, making this assembly a practical option for compatible AR-platform builds. Always verify applicable federal, state, and local laws and regulations before purchasing, assembling, or using this product. 5in Barrel; A2 Flash Hider;