The Buffer Detent.

This expert guide from the School of the American Rifle details how to identify and address rough carrier key bores in AR-15 bolt carrier groups. The instructor, demonstrating expert knowledge, explains how these manufacturing defects, particularly on Colt components, can lead to premature wear on the gas tube and reduced reliability. Solutions involve replacing the defective carrier key to ensure smooth operation and longevity of the firearm.

This guide details the process of lapping an AR-15 receiver to ensure proper barrel alignment for improved long-range accuracy. Instructor Stephen Caleb from Brownells explains that receiver faces can be slightly out of alignment, leading to barrel runout. The process involves using a specialized lapping fixture and aluminum oxide lapping compound with a drill to create a perfectly flat receiver face. This ensures the barrel seats flush and square, critical for precision shooting beyond 500 yards.

This guide details the installation of an aftermarket AR-15 trigger, specifically a Timney Triggers product, into a clear lower receiver. The process involves unboxing, component inspection, mounting the trigger assembly with pins, and performing a function check. The demonstrative tone and clear handling of components suggest an experienced instructor guiding the viewer through a common firearm modification.

This guide details how to adjust an AR-15's adjustable trigger, focusing on reducing pre-travel and overtravel for a crisper break. It emphasizes safety checks and the use of a trigger pull gauge. The video, presented by an expert from AT3 Tactical, explains that adjustable triggers offer customization for accuracy and performance, particularly for competition shooters and range enthusiasts, but may not be ideal for home defense or casual use due to potential safety concerns if set too light.

This guide addresses common feeding and hammer drop issues encountered with a Beretta 92 .22LR conversion kit. It outlines steps for inspection, potential break-in periods, ammunition testing, and checking critical internal components. The speaker, a hobbyist, suggests these troubleshooting steps are necessary when the kit experiences malfunctions.

This guide details the disassembly process for the gas trap variant of the M1 Garand, highlighting its differences from the later, more common models. It involves removing the bolt and operating rod first, then a specific screw to release the gas trap, followed by the sight block, before the gas trap assembly can be rotated off. This early design proved less reliable than the later gas piston system.

This guide details how to clear common malfunctions on an AK-74 platform rifle, specifically when heavily fouled with mud. Expert instruction from Karl Kasarda demonstrates advanced techniques for dealing with failures to go into battery, feeding issues, and stuck chambers. The video emphasizes the importance of understanding mechanical tolerances and performing thorough cleaning after such extreme environmental testing.

This guide details the historical method of igniting and deploying 18th-century grenades, as demonstrated by Karl Kasarda of InRangeTV. It covers the preparation and use of a slow match to ignite the external timed fuse of a replica grenade. The video emphasizes that this is a replica and stresses the extreme danger and illegality of handling live explosives.

This guide details the proper application of a Gaza-style or CAT tourniquet, as demonstrated by Karl Kasarda on InRangeTV. It emphasizes initial strap tightness before windlass use for effective hemorrhage control and occlusion. The instruction highlights the importance of securing the windlass and managing patient pain during application.

This guide details the historical loading process for the 1836 Colt Paterson revolver, as demonstrated by Karl Kasarda. It covers the unique disassembly required, the precise powder charge and projectile seating using specialized tools, and the capping procedure. The instruction emphasizes a high level of expertise due to the intricate and period-specific nature of the task.