Videos tagged with Receiver Repair

This video details the process of repairing a chopped receiver section from a Star Z70 parts kit. Mark Serbu, a gun designer, demonstrates how to fabricate and weld in replacement metal to restore the structural integrity and form of the receiver. He emphasizes using an expanding mandrel for alignment and copper flashing to protect against welding spatter, while also discussing techniques to minimize heat distortion and achieve a functional repair using 'caveman tools' and optional CNC machining.

This guide details the process of recycling a worn AR-15 upper receiver, specifically addressing a worn charging handle latch shelf, into a dedicated .22 LR build. It highlights the advantages of dedicated .22 LR components over conversion kits and provides specific product recommendations for barrels, handguards, braces, and bolt catches. The process emphasizes practical repair and component selection for optimal rimfire performance.

This video provides an expert-level overview of an Armalite AR-18 parts kit, detailing its components and historical context. Mark Serbu, a gun designer, examines the kit, highlighting its origins from Sterling in England, Costa Mesa, California, and Hawa Hoa in Japan. He discusses the differences between the AR-18 (machine gun) and AR-180 (semi-auto), noting the auto sear's location in the upper receiver. The video also touches on the unique gas system with a fixed piston and moving cylinder, the barrel extension integrated into the trunnion, and the challenges of repairing a torch-cut receiver.

Mark Serbu, a gun designer, details the condition of a MAT-49 parts kit he acquired for over $2000. He discusses plans to repair a damaged barrel by pressing in pins and reaming, and addresses a bent receiver. He also notes unusual markings on the trigger group, suggesting a potential undocumented modification or variant.

This guide details the advanced gunsmithing procedure for replacing a side plate on a semi-automatic conversion of a Browning 1919 machine gun, focusing on the hot riveting technique. Master Gunsmith Mark Novak demonstrates the precise steps, from component alignment and rivet heating to driving and finishing, emphasizing the metallurgical principles behind hot riveting for a structurally sound and historically accurate restoration. The process requires specialized tools and a deep understanding of NFA regulations.