Beretta M1918: Italy's Semiauto 9mm Carbine from WWI

The Beretta M1918 is a rare Italian semi-automatic carbine from WWI, often mistaken for a submachine gun but firing only in semi-auto. It reuses parts from the 1915 Villar Perosa and operates from an open bolt with a delayed blowback system for safety. Chambered in 9mm Glisenti, it features a unique 25-round magazine and a trigger guard repurposed from a Vetterli rifle.

The OVP 1918, Italy's first submachine gun, is derived from the Villar Perosa light machine gun. It features a unique dual-trigger system for semi-auto and full-auto fire, and utilizes a 25-round Villar Perosa magazine with a front-mounted release. Its internal mechanics are striker-fired and open-bolt, with a safety mechanism involving slight bolt rotation.

The Beretta Model 1918/30 is a unique semi-automatic carbine, serving as a developmental link between earlier models and the later Beretta 38 family. It was designed from the ground up for police use, featuring a distinctive ring-shaped charging handle and a folding bayonet. A critical safety warning is issued regarding ammunition: only 9mm Glisenti should be used, as standard 9mm Parabellum is too high-pressure and will damage the firearm.

The M1915 Villar Perosa, a contender for the first submachine gun, was initially designed as an aircraft observer's weapon for WWI. Its dual-barrel system fired at an extremely high rate (up to 3000 RPM) using 9mm Glisenti cartridges, effective against early aircraft. Later adapted for ground combat, it evolved into iconic submachine guns like the Beretta M1918.

The Frommer Pistolen-MG Model 1917 was an experimental Austro-Hungarian machine pistol, a functional copy of the Italian Villar Perosa, developed by FEG. It modified Frommer Stop pistols to fire from an open bolt, mounted them on a tripod, and used 25-round magazines in .32 ACP. Despite its unique design, it was not adopted due to concerns about reliability with long magazines and the cartridge's limited effectiveness.

This video segment from American Rifleman Television's "I Have This Old Gun" series focuses on the historical Beretta Model 1938 submachine gun. It details the M1938's lineage from the Villar Perosa and its development by Tullio Marengoni. The description highlights its open-bolt, direct-blowback action, distinctive wooden stock, ventilated barrel shroud, and dual triggers for full-auto and burst fire. The evolution of the design through various models, including the 1938A and the simplified 38/42, is explained, along with its extensive use by Italian forces in WWII and by German forces as the MP 738(i) after Italy's surrender. The video also touches on the M1938's influence on the later Beretta M12.

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.