Wolfpack Armory Upper Receiver Side Charging Stripped Pistol Caliber Black

Wolfpack Armory Upper Receiver Side Charging Stripped Pistol Caliber Black. 45 caliber Designed for Pistol Caliber Blowback Bolt Carriers and have relief machined for Bolt Carriers that have a Cam Pin. Compatible with MP5 magazine lower receivers Specifications for Wolfpack Armory Side Charging Stripped Pistol Caliber Upper Receiver: Manufacturer: Wolfpack Armory Color: Black Finish: Billet Aluminum Condition: New Package Contents: Wolfpack Armory Side Charging Stripped Pistol Caliber Upper Receiver Wolfpack Armory NRSC-PC: Upper Receiver Side Charging Stripped Pistol Caliber Black