Forced-Air Cooling in an Experimental Ross Machine Gun

This video from Forgotten Weapons, hosted by Ian McCollum, details an experimental Thompson SMG chambered in .30 Carbine. Despite resembling a 1928 model, its rejection by the Ordnance Department was primarily due to its excessive weight (10-12 lbs unloaded), far exceeding military requirements for the M1 Carbine trials. The firearm's unique prototype status is highlighted by its serial number '1' and proprietary magazine.

This entry details the unique locked breech, rotating barrel mechanism of the rare Prototype vz.38 'Nutcracker' pistol in 9x19mm. Expert Ian McCollum explains its departure from standard blowback designs, highlighting the helical cam grooves and locking lug system responsible for barrel rotation during cycling. The guide focuses on understanding these internal mechanics, crucial for gunsmiths and advanced firearm enthusiasts interested in historical experimental designs.

This video explores a mysterious Winchester prototype firearm, potentially linked to Melvin Johnson and Project SALVO. Expert Ian McCollum analyzes its design, identifying features from Johnson's work and Winchester shotguns, suggesting it may have been a testbed for multi-projectile cartridges or a conversion experiment. The analysis highlights the importance of preserving undocumented prototypes.

This entry details the unique gas-operated mechanism of the Colt Prototype Self-Ejecting Revolver, as explained by Ian McCollum. It highlights the experimental nature of the design, its reliance on gas pressure for ejection, and the practical limitations that prevented its widespread adoption. The insights provided are valuable for understanding historical firearm development and complex mechanical systems.

This guide details the disassembly and bolt operation of the Swiss SK-46 prototype semi-automatic rifle, based on expert insights from the Forgotten Weapons channel. It covers removing the bolt assembly, understanding its two-piece operating rod and gas system, and the specific functions of the bolt handle for semi-automatic and manual operation, including its role in rifle grenade functionality. The process emphasizes careful handling and understanding of the unique mechanisms.

This video details the extremely rare .30-06 Thompson Submachine Gun prototype, a one-of-a-kind firearm previously considered mythical. Expert Brandon Herrera provides an in-depth look at its unique features, including a modified BAR magazine and a complex colleted bolt friction-delay system designed for the higher pressure .30-06 cartridge. The prototype's historical context and auction results are also discussed, highlighting its significance as a museum-quality artifact.

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.