Stamm-Saurer Model 1916 Short-Recoil Light Machine Gun

The LMG-25, Switzerland's first modern light machine gun, features a unique toggle-locking system developed by Adolf Furrer. Chambered in 7.5x55mm Swiss, it offers select-fire capability and a 30-round magazine compatible with the Stgw 57. A notable feature is the Advanced Primer Ignition (API) system, which reduces felt recoil and rate of fire by igniting the primer while parts are still moving forward.

This "From the Vault" video explores the rare Johnson Model 1941 light machine gun, a potential successor to the Browning BAR. Hosted by Brownells Gun Techs Keith Ford and Steve Ostrem, the segment delves into the design's innovative features like its short-recoil system, rotating bolt, and selectable fire rates (200-600 RPM). While noting its advanced design for the era, including an easily replaceable barrel and open bolt firing in full-auto for cooling, the video also highlights its drawbacks: an awkward side-feeding 20-round magazine and significant recoil. Approximately 9,200 units were produced, seeing service mainly in the South Pacific. Ultimately, despite its fascinating place in firearms history, the Model 1941 did not surpass the BAR in overall utility.

The Bren MkI is highlighted as a feature-rich light machine gun from World War Two, notable for its stabilization handle and innovative 30-round magazine design that prevents rim lock. Its operating mechanism fires from an open bolt, utilizing a gas piston system for cycling. The fire selector offers automatic, semi-automatic ('Repetition'), and safe modes, with a dust cover protecting the magazine well.

This review details the Portuguese FMP HK21, a belt-fed light machine gun derived from the H&K G3 rifle. Key differences include a specialized feed unit and a modified bolt carrier with a cam track to operate the belt feed mechanism. The HK21 maintains significant parts commonality and training similarities with the G3, simplifying logistics and user transition.

The HK21 is the belt-fed light machine gun variant of the H&K G3 rifle, sharing approximately 48% parts commonality. Developed for export markets, it offered a common small arms family for nations already using the G3. Portugal was a key adopter, licensing production at FMP. While robust, its high rate of fire and recoil led to the development of the HK21E.

The LMG 08/15, a lighter variant of the Maxim MG 08, was adapted for aircraft use due to its closed-bolt firing, enabling synchronization with propellers. Its air-cooled, slotted jacket design and unique pilot-operated charging mechanism highlight its specialized role. Aircraft variants are rare collectors' items, often missing their complex hardware.

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.