M1918A2 MOR: How to Make a Non-NFA BAR

The M1918A2 MOR (Manually Operated Rifle) was a unique non-NFA BAR variant developed by Walter Newman of Group Industries in the 1980s. It fired from an open bolt but lacked a gas system, requiring manual cycling for each shot to bypass NFA regulations. Only 68 receivers were produced, with later examples assembled by various gunsmiths, eventually influencing the development of the semi-auto M1918A3 BAR.

This custom, transferable 7mm Mauser BAR was built to emulate the 'fighting rifle' concept, offering superior handling and performance over standard models. Key modifications include a 21-inch barrel, adjustable gas system for surplus ammo, enhanced ergonomics with an extended pistol grip, and 1917 Enfield sights. Evidence of heavy use suggests its effectiveness as a modified firearm.

This video showcases a Browning Automatic Rifle (BAR) experiencing issues with shell casings being ripped in half during its 2020 rental season. Despite using the lowest gas setting, the problem persisted. Experts identified that the thinner brass casings of standard civilian ammunition were not durable enough for the BAR's extraction process. The solution implemented was switching to Colt Nickel-Plated 30-06 ammunition, which resolved the casing issue and allowed for operation on higher gas settings. The video highlights a common problem faced by owners and operators of older or powerful firearms with certain ammunition types.

This YouTube video, "Faxon Q&A #4," features a discussion with Faxon about various aspects of firearm barrels. The experts delve into the differences between chamber types like .223, 5.56 NATO, and match/Wylde, explaining their relevance and practical implications. They also explore the meaning of tight versus loose chamber cuts, the requirements for achieving "subMOA" accuracy, and the distinction between true match and "subMOA" barrels. The conversation further covers the evolution of "match" standards, the processes of lapping and honing, and a detailed explanation of headspace, its measurement, adjustable headspace, and potential consequences of incorrect headspace. Additionally, the video addresses thermal dissipation in barrels, contrasting weight versus function and discussing barrel designs for sustained fire versus general use, citing historical examples like the BAR and Chauchat, and the M16's role. Finally, it touches on fitting extensions to receivers and the accuracy impact, and clarifies that AR-15 locking recesses are part of the barrel assembly.

This video details the unique 'French Finger Trap' issue with the MAS-36 rifle's bayonet, where two rifles can become unintentionally locked together. A 1951 French arsenal memorandum identified this problem, proposing a simple modification to the bayonet handle. Drilling a small hole allows a tool, like a firing pin, to depress the internal spring, enabling the separation of locked rifles.

The M134 Minigun is a scaled-down 7.62 NATO rotary cannon, requiring 24V DC power and consuming 1.5 kW. Its high rate of fire (3,000+ RPM) is essential for aircraft engagement windows. The complex delinker mechanism is critical for feeding ammunition, and practical hand-held use is impossible due to weight and recoil. Live fire demonstrates rapid ammunition consumption and the need for indirect aiming.

The H&K G11 is a revolutionary prototype assault rifle designed in the late 20th century, notable for its caseless ammunition and unique rotating drum bolt mechanism. Despite advanced features like a 2000 RPM burst fire rate and integrated optics, its development was ultimately halted by geopolitical shifts and cost concerns.

This video demonstrates the assembly and live-fire of the German 1936 pattern light mortar (L.Gr.W.36). It highlights the mortar's leveling mechanism for accuracy and the difficulty in visually tracking its 50mm projectiles after firing. The content showcases historical military hardware and its operational use.