How Does it Work: Short Stroke Gas Piston

This video provides a detailed field stripping guide for the Brownells BRN-180™ Gen2 upper receiver, led by product team leader Paul Levy. The demonstration covers the process of removing the upper from the lower, retaining the recoil assembly, and disassembling the charging handle and bolt carrier group. It also highlights the simplified handguard removal using an Allen wrench and details the disassembly of the gas piston system, including the front regulator, piston cup, piston, and spring. The video notes similarities and differences compared to the original Gen1 and the BRN-180S™ .300 Blackout model, emphasizing reassembly is in reverse order.

This comprehensive guide details the field stripping and reassembly of the B&T APC308, presented by an expert instructor from Arm&Gun. It covers safety checks, removal of the optic, lower receiver, stock, recoil spring, BCG, bolt, and gas system. The video highlights design similarities to other platforms and the unique hydraulic buffer system, concluding with reassembly and a function check. The instruction emphasizes methodical procedures and appreciation for the firearm's engineering.

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.