How to Assemble an AR-15 Bolt Carrier Group Presented by Larry Potterfield of MidwayUSA

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 video demonstrates the assembly of an AR-15 lower receiver, focusing on the installation of critical components like the trigger group, safety selector, and buffer system. The builder, exhibiting advanced armorer skills, utilizes specialized tools and techniques for a precise build. While edited for entertainment, the process highlights the methodical approach required for a reliable firearm.

This YouTube video offers practical tips and techniques for polishing stainless steel firearm components. The content focuses on achieving a high-quality finish on gun parts, likely aimed at gunsmiths, hobbyists, and firearm enthusiasts looking to customize or maintain their weapons. The video emphasizes real-world application and likely demonstrates various methods and tools used in the polishing process for stainless steel firearms.

This entry details the unique XR-86 custom rifle, a 1986 build by Wilfred Ellis. It masterfully combines components from an M60 (flash hider), an M14 (gas system), and an AR-15 (trigger, bolt, locking system). The AR-15 trigger is notably rotated 90 degrees, and its bolt is integrated with the M14 gas system, showcasing advanced gunsmithing.

This guide details the installation of an aftermarket AR-15 trigger, specifically a Timney Triggers product. The process involves unboxing the trigger, identifying its modular components like interchangeable shoes, and then carefully installing it into a lower receiver. A function test is crucial to confirm correct operation. The speaker demonstrates proficiency with firearm components and installation procedures.

This video showcases advanced Cowboy Action Shooting techniques demonstrated by The Lever Action Kid. It highlights rapid engagement with a lever-action rifle, followed by a high-speed transition to dual single-action revolvers. The stage concludes with efficient manual reloading of a side-by-side shotgun.

This video provides an in-depth look at the Mosin-Nagant M91/30 PU Sniper rifle, showcasing its historical significance and operational features. It details the firearm inspection, loading procedures for 7.62x54R rounds, and a live-fire demonstration. The expert handling and clear visuals highlight the rifle's characteristics and performance.

This video details the complex gunsmithing process of reboring a Winchester 1885 Low Wall rifle from a pitted .32 Rimfire to a .357 Magnum. It covers barrel removal, sending it to a specialized shop for reboring and rifling, precise chambering and crowning on a lathe, and converting the action from rimfire to centerfire. The process concludes with barrel marking and finishing.

This video details the internal mechanics and cycle of operation for the Winchester Model 12 pump-action shotgun using a cutaway model. It explains the loading process into the magazine tube, the function of the safety mechanism, and the sequence of firing, extraction, and chambering. The demonstration highlights the hammerless design and the interaction of key components like the extractor and ejector.