Ruger MP9 Introduction

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 complex process of restoring a deactivated Bergmann MP-18 submachine gun, as demonstrated by expert gunsmith Mark Novak. It covers specialized machining techniques using custom tools on a lathe to remove deactivation welds, repair the bolt face, and manufacture replacement parts. The process requires advanced gunsmithing skills and adherence to legal regulations for firearm restoration.

This guide details the disassembly and suppressor overview of the Chinese Type 85 SMG, as presented by Ian McCollum. It covers identifying key components like the fire selector, understanding its blowback operation, and examining the unique suppressor design featuring a perforated barrel and expansion chamber. Proper safety precautions are emphasized throughout the process.

This entry details the operation of the Thompson Model of 1921, focusing on its iconic drum magazine and select-fire mechanism. Expert Ian McCollum provides a close look at the firearm's internal workings, including the winding of the 50-round drum and the firing cycle. The information is presented with a high degree of technical detail, suitable for enthusiasts and those interested in historical firearms.

This guide provides an overview of the Hyde/Marlin M2 submachine gun's disassembly, as presented by Ian McCollum. It highlights the firearm's unique construction, including its sintered metal components and open bolt blowback mechanism. The M2 is noted for being lighter and cheaper to produce than the M1 Thompson, utilizing compatible magazines.

This video explores a unique firearm concept: an MP5 submachine gun modified to feature AR-15 controls. The title and description indicate the video is now live and focuses on this innovative combination, likely showcasing the integration and functionality of the AR-15 style controls on the classic MP5 platform.

This guide details the complex process of converting a lathe into a 12-barrel blank-firing gun, as demonstrated by Mark Serbu. It highlights the critical engineering challenges, including precise alignment, CNC control, and the application of PID theory to overcome firing inconsistencies. The project emphasizes safety and legal considerations, focusing on blank ammunition to avoid machine gun manufacturing regulations.

This video demonstrates how to rifle a barrel in a home shop using basic tools, bypassing expensive CNC equipment. It covers material preparation, precise drilling and reaming, and the critical process of pushing a rifling button. While a DIY approach is shown to be possible, the video highlights the significant difference in quality and precision achievable with professional CNC machining.

This video provides an expert-level analysis of a catastrophic failure of the Serbu RN-50 rifle, presented by the firearm's designer, Mark Serbu. The examination focuses on the severe damage to the receiver, breech cap, and barrel assembly, offering insights into potential failure points and the effects of extreme forces. The analysis also touches upon the ammunition used, specifically SLAP rounds, and their potential role in the incident.

Mark Serbu, a gun designer, addresses the RN-50 blow-up incident involving Scott from Kentucky Ballistics. Serbu reassures customers that the RN-50 is a safe design, attributing the incident to a counterfeit and faulty ammunition round. He emphasizes the importance of sourcing ammunition carefully and highlights the rifle's extensive safe operational history.