Videos tagged with Blowback Bolt Carrier Group

This video reviews the Delta Team Tactical "Grackle" 4" 9mm Upper Receiver, highlighting it as a budget-friendly option for a sub-gun, bag gun, or truck gun. The reviewer notes its exceptional performance and accuracy for its ~$300 price point, despite minor issues with the ejection port size and blast forwarder threading. The build features a KAK 4" barrel, a billet slab-side upper, and a United Defense Labs bolt carrier group compatible with Colt and Glock magazines. It was tested with various ammunition types, demonstrating no failures.