SHOW 2025: Aly & Kaufman L85A1 From BRN-180

This video explores the AKB-23 conversion kit, allowing an AR-15 platform to mimic the British L85 bullpup rifle. It highlights the use of a Brownells BRN-180 upper receiver and custom polymer furniture, achieving approximately 90% aesthetic accuracy to the original design. The content includes a live-fire demonstration, showcasing the rifle's performance and the polarizing nature of bullpup firearms.

This video showcases a "Meta Tactical Pistol To Bullpup Rifle Kit," a conversion system that transforms a pistol into a bullpup rifle configuration. The title suggests a demonstration and review of this kit, highlighting its potential for enhanced firearm functionality and tactical applications. The content likely focuses on the mechanics of the conversion, the resulting firearm's ergonomics, and its performance characteristics.

This guide details the installation and operation of the X-PRT90 progressive trigger system for the FN PS90 SBR. The X-PRT90 offers a unique third position that allows for a faster rate of fire by pushing through the trigger pull, effectively creating a legal 'forced reset' malfunction. The video also touches on CMMG barrel modifications and the PS90's unique bottom ejection.

This video details the assembly and testing of a custom AR-15 bullpup rifle using the A3 Tactical Triad Bullpup Chassis. It covers integrating a Palmetto State Armory lower with a Brownells BRN-180 upper and highlights the selection of a True North Concepts foregrip over the Die Free Tiger Claw for durability. The build is then taken to an outdoor range for live-fire testing, demonstrating its cycling and ergonomics.

This product spotlight video from Brownells features Caleb introducing and demonstrating charging handle options from A3 Tactical specifically designed for the BRN-180 platform. The video covers an unboxing and overview of original and A3 Tactical handles (grooved cutout and round designs). A significant portion is dedicated to the innovative non-reciprocating side charging handles, detailing their construction (aluminum and steel) and installation process, which involves replacing the original handle. Practical demonstrations highlight the non-reciprocating functionality. The video emphasizes the modularity, ease of use for both left and right-handed shooters, and durability of the A3 Tactical charging handles, concluding with maintenance tips and an invitation for viewer questions.

This video provides a quick tutorial from Brownells' Caleb on how to change the muzzle device on a BRN-180 upper receiver. It covers safely field stripping the upper, two methods for muzzle device removal (one requiring handguard and gas system disassembly), the importance of padded vice jaws for protection, and proper tightening techniques including crush washer alignment and torque. The video highlights the unique handling requirements of the BRN-180 design and aims to equip viewers with practical skills for firearm maintenance.

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.