Vietnam War 20mm Mk-68 Gun Mount "Brown Water Navy" Fast Patrol Boat (PTF Nasty) - SPEEDRUN ASSEMBLY

This guide details the expert-level assembly of the 20mm Mark 16 Autocannon onto its Mark 68 Mod 1 Mount. The process involves precise mechanical alignment, securing critical components with pins and bolts, installing operational linkages, and attaching accessories like the brass catcher and ammunition box. Safety wire application is emphasized for critical pins. The guide concludes with a demonstration of the weapon system's movement capabilities on the mount.

This video demonstrates the restoration of a rare 20mm Naval Drill Round, showcasing the transformation from a tarnished, oxidized state to a highly polished collectible. The process highlights professional-grade metal polishing techniques to reveal historical markings on the brass casing and projectile. The speaker, an expert in ordnance restoration, emphasizes the value of such collectibles.

This video demonstrates the professional installation of dual 20mm smoothbore barrels onto a Mark-11 autocannon receiver, a system utilized by the US Navy on jet fighters. The process highlights the precision handling and specialized tools required for assembling heavy ordnance. Expertise is shown by professional ordnance technicians performing the delicate task.

This guide details the specialized process of removing a rifled insert from a 20mm Mark-11 Autocannon revolver cylinder. The video demonstrates expert techniques using specific tools for this rare naval weapon system. It highlights the unique design where spin is imparted by these inserts before the projectile enters the main barrel.

This video demonstrates the functionality of an M4 20mm ammunition linker and delinker. The device is designed to process up to 12 rounds of 20x110mm Hispano-Suiza ammunition at once. The description also notes that the item is available for purchase on Ordnance.com, indicating a potential sales or product showcase element.

Edwin Sarkissian demonstrates a satirical build of an 'AR20mm cannon' using a Smith & Wesson M&P-15 lower receiver. The build highlights unconventional attachment methods like zip ties and velcro, and a makeshift firing pin from a drywall screw. A budget red dot sight is also incorporated into this humorous, non-functional firearm concept.

This review provides a detailed look at the Finnish L-39 Lahti anti-tank rifle, nicknamed 'Norsupyssy'. The video demonstrates its operation, including loading the 10-round magazine with 20x138mmB cartridges, charging the heavy bolt, and adjusting the specialized sights. Live fire showcases the rifle's significant muzzle blast, recoil, and gas-operated cycling, highlighting its role as a formidable anti-armor weapon from WWII. The instruction comes from an experienced individual knowledgeable in handling rare heavy ordnance.

This guide details the operation and firing of the 127-year-old U.S. Army 3.2-inch Model 1897 Field Gun. It covers essential steps from carriage preparation and barrel elevation to breech operation, projectile loading, and firing. The demonstration emphasizes proper handling of historical mechanical systems and period-accurate projectiles, showcasing the gun's recoil and smoke production. Instruction is provided by an expert with high authority in historical ordnance.

This video demonstrates the expert opening of a sealed 'spam can' containing 20mm M18A3 drill cartridges, manufactured in March 1950. The presenter, exhibiting high authority and expertise in handling vintage military surplus, utilizes the can's integrated opener. The process highlights the inspection of headstamps and the important safety warning found inside the container regarding its use for food storage.

This video demonstrates the basic operation of a Soviet 82mm mortar. The footage, from a professional with high authority and expertise signals like safe handling and proper PPE use, shows the process of loading an 82mm round into the muzzle and its subsequent firing upon impact with the firing pin. The visual evidence confirms the detonation of the round at the target area, illustrating its kinetic and explosive effects.