Interdynamic MP-9 SMG: Origin of the TEC-9

This video delves into the Interdynamic MP-9, the precursor to the TEC-9, highlighting its simple open-bolt design and selector mechanism. It details the fire selector ('F' for semi-auto, 'A' for auto) and the unique notch safety on the charging handle slot. The explanation of the trigger's internal mechanics, particularly the disconnector's role in semi-automatic fire, showcases the firearm's historical engineering.

This short showcases the AA Arms AP-9, a direct copy of the TEC-9, highlighting its manufacturing origin in Mint Hill, North Carolina. The video features a live-fire demonstration, including shooting sodas and engaging steel targets from a first-person perspective. It emphasizes the firearm's markings and caliber.

The Agram 2000 is a Croatian submachine gun chambered in 9mm Parabellum, notable for its closed-bolt operation influenced by the TEC-9 and its unique ported barrel system designed for integral suppression. Produced in small workshops during the Croatian War of Independence, it was technically classified as a machine pistol due to its lack of a stock. Despite not being a standard military issue, it gained notoriety in the criminal underworld.

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.