Colt Automatic Machine Rifle Model 1919: the First Commercial BAR

The Colt Monitor, officially the R80, was a 1931 development of the BAR tailored for law enforcement. Modifications included removing military features, shortening the barrel to 18 inches, and adding a pistol grip and Cutt's Compensator for recoil management with the .30-06 cartridge. Its high cost limited adoption, with the FBI acquiring around 90 units.

The Colt Monitor, a rare variant of the BAR, was developed for law enforcement to counter early vehicle armor. It features a Cutts compensator for recoil management of the .30-06 round in a lighter 16lb frame. Despite its advanced design for the era, its high cost limited production to around 125 units, with the FBI being a primary adopter.

The FN Model 30 represents the first Belgian-made BAR, evolving from Colt's designs with metric retooling for Poland and commercial export. Key improvements include a rate-reducing mechanism for controllable automatic fire (350-600 rpm), an automatic dust cover, and a refined magazine release. While sharing similarities with the M1918, it features enhanced reliability through a reversed gas piston system and was produced in 7.65x53mm Belgian and 8mm Mauser calibers.

This review of the original 1918 BAR highlights its distinct features compared to later variants, such as the absence of a bipod and the presence of both semi and full-auto fire modes. The video emphasizes the superior usability of its aperture iron sights over the A2 model and details the specific safety mechanism on the fire selector. A live-fire demonstration showcases the rifle's shoulder-fired capability.

The US Army opted for the M1 Garand over a semi-automatic BAR due to weight and magazine requirements. The BAR, weighing 16 lbs, exceeded the 9.5 lb target for a new service rifle. Additionally, the military desired a clip-fed system, while the BAR used detachable box magazines. Captain Green's 1919 proposal for a semi-auto BAR was rejected by the Infantry and Cavalry Board, which favored a clip-fed, self-loading rifle.

The Swedish m/21 BAR, chambered in 6.5x55mm, was an early adoption of a light machine gun by Sweden, predating many post-WWI designs. Initially procured from Colt/FN, Sweden later licensed domestic production at Carl Gustafs. Distinctive features include a large pistol grip, a curved magazine for the 6.5x55mm round, and a mid-mounted bipod. The m/21 served until the m/37, which added a quick-change barrel.

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.