MAINTENANCE

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 expert-level guide, presented by Ian McCollum of Forgotten Weapons, details the critical dangers of amateur headspace adjustments on an AK-type rifle. The video highlights how grinding down locking lugs, evidenced by visible tool marks on the bolt and barrel, creates an extremely unsafe condition. It serves as a stark warning against improper gunsmithing techniques that can lead to catastrophic firearm failure.

This video demonstrates universal shooting standards, emphasizing under one-second engagement times from high and low ready positions. It showcases drills like the Bill Drill and a 3 Body, 2 Head sequence, highlighting efficient weapon manipulation and accuracy with a custom AR-15 build featuring an EOTech optic and GBRS Hydra Mount.

Proper posture while wearing body armor is crucial for maximizing ballistic protection. Leaning forward exposes the clavicle and upper chest, allowing rounds to bypass plates. Standing upright and bracing ensures the armor plates are presented directly to the threat, covering the vital areas effectively.

This GBRS Group video emphasizes mastering carbine reloads by prioritizing proper technique over raw speed. It highlights the critical importance of a firm, forward support grip (like a C-clamp) for weapon control during CQB and high-stress scenarios, warning against sacrificing fundamentals for fast 'par times'. The correct sequence involves sending the bolt, moving the support hand forward, establishing a solid grip, and then re-acquiring the target.

This performance review showcases advanced tactical training integrating high-intensity physical and mental stress. Drills include live-fire range exercises with rapid transitions, CQB in a shoot house under fatigue, and simulated combat stress via intense cardio intervals. The session emphasizes the critical link between physical conditioning, stress management, and effective weapon manipulation.