How Does it Work: Open Bolt vs Closed Bolt Firearms

The rate of fire in machine guns is primarily dictated by the bolt's cycle time. Key factors influencing this are the bolt's travel distance and its average velocity. Shorter bolt travel and higher velocity lead to a faster cycle and thus a higher rate of fire. In blowback systems, the cartridge case's rearward force initiates the cycle, and reducing bolt mass can increase cyclic speed.

This video explains the mechanics of the long-stroke gas piston system, commonly found in firearms like the AK-47 and AKM. It details how gas pressure from firing drives a piston, which is integrated with the bolt carrier, to cycle the action for the full length of its travel. The explanation contrasts this with short-stroke systems where the piston is a separate component.

This YouTube video, titled "The Magic Behind This Gun Barrel’s Pinpoint Accuracy!", explores the technical aspects contributing to a firearm's precision. While the title highlights accuracy, the description focuses on promoting the channel's various YouTube presences and social media links, rather than detailing the specific content of the video itself. It's a '#shorts' video, suggesting a concise format. The content likely delves into firearm mechanics, specifically barrel technology, to explain how pinpoint accuracy is achieved.

This YouTube video focuses on firearms technology, specifically exploring the concepts of delayed blowback operation and the use of suppressors. While the description is brief, the title clearly indicates a technical discussion and demonstration of these firearm mechanisms. It's likely to appeal to enthusiasts interested in the engineering and practical application of suppressed firearms.

This video focuses on the concept of "Low Bore Axis" in firearms. While the description doesn't specify the types of firearms discussed, the title strongly suggests a technical discussion related to firearm design and handling. The analysis will infer potential firearm types and related topics based on this core concept.

This YouTube Short explores the concept of gas blowback in piston-operated firearms, challenging the notion that such systems lack this feature. The video aims to educate viewers on the mechanics and functionality of piston guns, likely demonstrating how they do indeed utilize gas to operate. It's presented by Classic Firearms, a known entity in the firearms community, and promotes their other channels and social media presence.

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.