The reversible barrel Bren Machine Gun? With firearms and weapon expert, Jonathan Ferguson

This video provides a comprehensive guide to building a 16-inch LMT MARS-H rifle chambered in .308 Winchester, configured as a Designated Marksman Rifle (DMR). The build process covers lower receiver assembly, buffer system configuration specific to the MARS-H, upper receiver and barrel installation, muzzle device and suppressor mounting, and accessory integration. The instructor, Caleb from Brownells, details the parts and techniques required, emphasizing specific component choices and their rationale.

This guide details the process of changing calibers using the LMT MRP Quick Change Barrel System, as demonstrated by a manufacturer representative. The system allows for rapid barrel and caliber swaps, enabling users to transition between calibers like 7.62 and 6.5 Creedmoor in approximately 60 seconds. The 14.5-inch barrel offers a balance of ballistic performance, comparable to an M110, within the compact footprint of an M4 platform.

This video showcases the Q "The Megafix" rifle, a lightweight magnum powerhouse featuring a .300 Win Mag chambering and an 18-inch Proof Research barrel. Expert insights are provided on its modular design, including an AR-style control interface and a 45-degree bolt throw. The demonstration highlights a unique quick-change barrel system, allowing for rapid barrel swaps by loosening a few screws. Live fire testing by Classic Firearms confirms its potent performance despite noticeable recoil.

This guide details the field stripping process for the Finnish KvKK 62 light machine gun, as demonstrated by Ian McCollum. The process involves removing the recoil spring and separating the upper and lower assemblies. The KvKK 62, adopted in 1962, shares some design elements with other notable firearms like the RPD and Bren gun, but has a unique Finnish implementation.

This video demonstrates the quick-change barrel system on the Hydra Weaponry Viper. It highlights the ease of swapping barrels and magwells to change calibers or magazine compatibility. The presenter tests for a shift in impact after reinserting the barrel, providing practical insight for users.

This guide details the design and prototyping of a high-capacity helical magazine, drawing inspiration from historical designs like the Lewis and Bren guns. It covers the mechanical principles for reliable feeding, the use of SolidWorks for precise CAD modeling, and considerations for future scaled-up, gear-driven versions intended for custom firearms. The speaker, Hoffman Tactical, demonstrates advanced knowledge in firearm accessory design and fabrication.

Ian McCollum and Jonathan Ferguson of the Royal Armouries present a challenge to find three unique firearms based on appearance, mechanical oddity, and historical impact. They showcase experimental and rare pieces like the Charlton Automatic Rifle, Sterling 7.62mm prototype, Schwarzlose Model 1898, Gabbett-Fairfax Mars pistol, an SA80 prototype, and a BSA Machine Carbine, highlighting their unusual mechanisms and limited adoption.

This entry details the Knight's Armament KS-1 (L403A1), the British Army's new Alternative Individual Weapon, adopted under Project Hunter. Expert Jonathan Ferguson from the Royal Armouries provides an in-depth look at its features, intended use for specialized units, and its role in supplementing existing platforms like the SA80.

This guide details the process of arming an 11th-century Norman knight, as explained by an institutional expert from the Royal Armouries. It covers the sequence of donning essential protective gear, including padded undergarments, a mail hauberk, a nasal helmet, and a kite shield, emphasizing weight distribution and historical construction techniques.

This guide details the installation and operation of the Harston's Patent Mark IV magazine, a rare modification designed to convert the single-shot Martini-Henry rifle into a repeater. Expert Jonathan Ferguson explains the mechanism, its inventor Captain Charles Gravelle Harston, and the historical context of its development. The guide covers fitting the magazine, the cycling process for feeding rounds, and the use of the cutoff device for single-shot operation, while also noting potential reliability issues and the high conversion cost.