White Prototype Open-Bolt LMG

This guide details the disassembly of the RPB Semiauto M10 SAP, highlighting its open-bolt operation and the specific trigger group modifications that differentiate it from full-auto variants. The video, presented by Ian McCollum of Forgotten Weapons, offers a high level of technical precision, explaining the mechanics and historical context of this firearm, including its classification challenges with the ATF.

This entry details the SAP M10, a semi-automatic variant of the MAC-10, focusing on its open-bolt operation and internal mechanism. It highlights the ease of conversion to full-auto, which led to regulatory scrutiny from the BATF. The information is presented with high authority, drawing on detailed mechanical explanations and historical context.

This guide details the disassembly of the Lewis Gas-Operated Prototype Pistol, as demonstrated by Ian McCollum of Forgotten Weapons. It covers removing the bolt assembly and understanding the gas-operated, rotating bolt mechanism. The video highlights the unique features of this experimental firearm, including its open-bolt operation and reversible firing pin, while also noting its comparison to the more practical 1911.

This guide details the simple field stripping process for the Gevarm A6, an open-bolt semi-automatic .22 LR rifle from France. Expert Ian McCollum demonstrates how to access the internal components, including the unique adjustable recoil weight, by removing a single thumb screw. The process highlights the rifle's mechanical simplicity and emphasizes crucial safety procedures for handling firearms with an open-bolt design.

This guide details the key differences between the original open-bolt MAC-10 and later closed-bolt variants, particularly those from Masterpiece Arms. It highlights the mechanical distinctions, the reasons behind the design changes driven by ATF regulations, and improvements made by Masterpiece Arms. The information is presented with the authority of a former RPB employee with direct manufacturing experience.

This entry details the operation of the rare 1854 Treuille de Beaulieu rifle, a unique open-bolt falling block design chambered in 9x46mm pinfire. Expert Ian McCollum explains its distinct cocking lever and trigger mechanism, its historical context with Napoleon III's Cent-Gardes, and its impressive 1-meter bayonet. The rifle represents early metallic cartridge experimentation and a blend of cutting-edge technology for its prestige.

This guide details the specific technique for separating two MAS-36 rifles that have been inadvertently locked together by their bayonets. It outlines the historical context of this issue, the modification made to the bayonet to resolve it, and the step-by-step procedure for disengagement. The technique requires precise alignment and the use of a pointed tool to access the internal release mechanism, as demonstrated by firearms expert Ian McCollum.

This guide details the loading and firing procedure for the M134 Minigun, as explained by Ian McCollum. It covers manual indexing of the barrel cluster, feeding the ammunition belt, engaging controls, and firing. The guide also touches upon the weapon's spin-down inertia and the function of modern clutch systems. Expert instruction from a recognized firearms historian highlights the technical aspects of operating this powerful weapon system.

This guide details the operational features of the H&K G11 K2, a prototype assault rifle known for its caseless ammunition and unique rotating drum bolt. It covers the selector settings, magazine capacity, integrated optics, and the internal action designed for recoil management during high-rate-of-fire bursts. Expert insights from Ian McCollum highlight the historical context and technical innovations of this advanced firearm.

This guide details the operation of the German L.Gr.W.36 50mm light mortar, as demonstrated by expert Ian McCollum. It covers assembly, leveling procedures, ammunition handling, and live fire execution, emphasizing the difficulty in visually tracking the projectile. The instruction highlights the importance of proper setup for accuracy.