Renovating an Abandoned Machine Gun

This guide details the evolution of AR-15 carrier key staking from early 'Gen 1' square staking to modern 'Gen 5' OCKS with serrated heads. It emphasizes proper torque values (vintage 35-40 in-lbs, modern 55-58 in-lbs) and the importance of sufficient metal displacement for screw security. The video, presented by an expert from School of the American Rifle, critiques commercial staking and references historical technical manuals.

This video from School of the American Rifle highlights critical manufacturing defects in AR-15 bolt carrier keys, specifically focusing on rough internal bores. Lead instructor demonstrates how a poorly finished carrier key can cause significant friction, premature wear on components like gas tubes, and operational issues, contrasting a problematic new Colt carrier with a well-functioning older model. The expert emphasizes the importance of a smooth bore for reliable function and longevity of expensive parts.

This guide details the reassembly process for the HK MR223 rifle, covering the bolt carrier group, upper and lower receiver connection, and essential function checks. It also demonstrates magazine loading and chambering a round. The instruction is provided by an experienced individual, showcasing proficient firearm handling.

This expert-level guide details the disassembly of the Ruger Harrier rifle, emphasizing crucial safety precautions throughout. It covers separating the upper and lower receivers, removing the bolt carrier group and charging handle, and further disassembling the bolt carrier group into its core components. The instructions are clear and actionable, suitable for intermediate users seeking to perform routine maintenance.

This guide details the reassembly process for the Ruger Harrier Rifle, emphasizing critical safety precautions. It covers the step-by-step installation of the bolt, bolt carrier, cam pin, firing pin, charging handle, and the joining of upper and lower receivers. The instructions are delivered with expert clarity, ensuring proper function and safe operation after reassembly.

This video addresses a common problem encountered with AR-15 firearms, specifically an undersized extractor spring pocket. The presenter highlights the optimal pocket size of .158 inches, indicating a potential point of failure or malfunction in the AR-15 platform. The content appears to be focused on troubleshooting and gunsmithing for AR-15 owners.

This video explores the AirForce Texan SS, a suppressed .45 caliber big bore air rifle, and the Sam Yang Dragon Claw .50 caliber air rifle. It highlights how these powerful airguns, despite their significant energy output (around 500 ft-lbs for the Texan SS), are not legally classified as firearms, allowing their integrated suppressors to bypass NFA regulations. The review includes sound comparisons, accuracy tests at 100 yards, and penetration demonstrations, showcasing their surprising effectiveness.

This video features former Special Operations sniper Nicholas 'The Reaper' Irving demonstrating various firearms and sharing combat insights. Key takeaways include the performance of the Barrett M107A1 and SR-25, the extreme recoil of the S&W 500 Magnum, and the effectiveness of .50 BMG rounds against an engine block. Irving's expertise as a decorated sniper significantly enhances the technical depth of the content.

This expert guide details the dangerous consequences of firing incorrect calibers in handguns, as demonstrated by firearms instructor Matt Carriker. It covers firing .380 ACP in a 9mm, 9mm in a .40 S&W, and .223 Remington in a .40 S&W, highlighting malfunctions like failure to cycle, bulged casings, and blown-out necks due to improper headspacing and lack of chamber support. The video emphasizes the critical importance of using the correct ammunition for firearm safety and function.

This review by Demolition Ranch tests the ballistic resistance of Flex Tape against various firearms, including the FN PS90 and CZ Scorpion. The experiment demonstrates that even significant layers of Flex Tape are easily penetrated by common calibers, highlighting the limitations of improvised ballistic materials. The video features expert handling and detailed explanations of firearm mechanics and ballistics.