GC_UPC TacFire BU-556-5 Pistol Upper Assembly 5.56x45mm NATO Caliber with 5 in Black Nitride Barrel, Black Anodized 7075-T6 Aluminum Receiver & M-LOK Handguard for AR-Platform Includes Bolt Carry Group $297.36 BU5565 show more like this Flat Rate Starting at $11.99 Hinterland Outfitters GC_UPC Tacfire 5.56x45mm 5" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard, and Adjustable Gas Block - BU-556-5 $309.19 BU-556-5 show more like this Calculated in Cart Classic Firearms GC_UPC Tacfire Bu-556-5 Pistol Upper Assembly 5.56X45mm Nato Caliber With 5" Black Nitride Barrel, Black Anodized 7075-T6 Aluminum Receiver & M-Lok Handguard For Ar-Platform Includes Bolt Carry Group $309.19 BU-556-5 show more like this Firearms $18.45, Free over $500 Shooting Surplus GC_UPC TacFire BU-556-5 Pistol Upper Assembly 5.56x45mm NATO Caliber with 5" Black Nitride Barrel Black Anodized 7075-T6 Aluminum Receiver & M-LOK Handguard for AR-Platform Includes Bolt Carry Group $310.49 BU5565 show more like this $10.95 flat rate GunStuff TV