Marston 3-Barrel Selectable Pocket Derringer

This video provides a detailed, visual exploration of the Colt Model 1900 Cutaway pistol, presented by Legacy Collectibles. It offers close-up views of the firearm's internal and external components, demonstrating basic operational functions like magazine loading, slide racking, and cartridge ejection. The presentation highlights the intricate mechanics of this historical firearm.

This video details the operation of the Pauly System pistols, highlighting Samuel Pauly's pioneering work on self-contained cartridges. The pistols feature a unique loading mechanism where the barrel pivots down for a percussion cartridge. Internally, they are hammer-fired, utilizing a free-floating striker retracted by a hook on the hammer, which then protrudes forward to ignite the cartridge upon trigger pull.

This video delves into the internal workings of the iconic 1860 Henry lever-action rifle. The description highlights that its functional mechanism is identical to the later and more well-known 1866 and 1873 Winchester lever-action rifles, suggesting a comparative or in-depth mechanical explanation. Viewers can expect to understand the lever action system common to these historical firearms.

This video explains the roller locking mechanism, differentiating it from roller delay systems. It details how symmetrical rollers are forced outward into the slide by a central block, locking the barrel and slide together. The explanation covers how angled surfaces during recoil cause the rollers to retract, unlocking the barrel for cycling.

Roller locking is a fully locked firearm action, distinct from roller-delayed blowback. It functions by rollers resting against a central block, forcing them outward to lock the barrel assembly. Unlike roller-delayed systems, roller locking requires an external force, like short recoil, to unlock. This mechanism is exemplified in firearms such as the CZ 52 pistol and the MG42 machine gun.

This YouTube video, titled "Glock. Come funziona lo scatto." (Glock. How the trigger works.), aims to explain the "safe action" trigger mechanism of Glock pistols in a simple manner. The description highlights that the video is part of the "polymer plus" playlist, which delves into technical aspects and usage of polymer-framed pistols, with a particular focus on Glock. It also includes safety tips for pistol preparation and thanks viewers. The video is produced by Vampire Guns and features individuals with appropriate firearm handling and repair qualifications, emphasizing that it is for informational purposes only and discouraging emulation without proper expertise.

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.