sa81 KRASA: Czechoslovakia's Ultra-Compact Lost PDW

The FN P90 is a unique bullpup Personal Defense Weapon (PDW) designed for armor penetration using a high-velocity 5.7x28mm round. Its innovative design features a sideways-feeding rotary magazine and ambidextrous controls with bottom ejection. Internally, it operates via simple blowback with an added weight to prevent bolt bounce, ensuring reliability.

This video provides a brief overview of several Heckler & Koch firearms showcased in Germany. It highlights the HK 433 rifle in tan, the HK 433 PDW in black, and the HK G39 in black, noting their respective calibers. A rifle equipped with a suppressor is also visible.

This video delves into the history and revival of the Colt MARS (Mini Assault Rifle System) by Centurion Arms. It highlights the MARS's innovative design, aiming for rifle-class power in a submachine gun form factor, and its superior ballistic performance compared to modern PDW rounds. The review emphasizes the technical challenges overcome in its resurrection and its potential relevance for special operations.

Elliott Delp provides an expert overview of the PSA Gen-4 GX AR-9 PDW, highlighting its compact and reliable nature. He specifically notes its 9mm caliber and compatibility with Glock magazines, making it a noteworthy option for those seeking a versatile firearm. The instruction is delivered with the authority of an experienced firearms instructor.

The CBJ-MS is a modernized Swedish submachine gun designed by Bertil Johansson, aiming for rugged durability over polymer PDW fragility. It features a unique muzzle sleeve for bipods, a forward grip with magazine storage, and a progressive trigger. The design draws inspiration from the Swedish K for reliability and utilizes a telescoping bolt similar to the Uzi, allowing for a compact receiver made from stamped stainless steel.

This review revisits a classic FPS Russia video showcasing the Kriss Vector in .45 ACP. It highlights the firearm's rapid-fire capability with explosive targets and its penetration power against beer kegs. The video also features a detailed ballistics gel test of G2 Research R.I.P. ammunition, demonstrating its unique fragmentation and wound channel creation.

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.