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

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 expert-level guide details the reassembly of the Ruger Harrier Rifle, presented by a Ruger firearms instructor. It covers the step-by-step process of assembling the bolt carrier group, installing it with the charging handle into the upper receiver, and joining the upper and lower receivers. Crucially, it emphasizes thorough function checks to ensure proper operation and safety after reassembly.

This video provides a detailed breakdown of the SKS rifle, challenging the common perception of it as a 'garbage commie rifle.' The instructor meticulously disassembles the firearm, explaining the function and design of various components, including the unique tilting bolt mechanism, the integrated bolt cover, and the fire control group. The explanation highlights the SKS's surprisingly refined engineering and safety features, offering valuable insights for firearm enthusiasts and designers.

This guide details a high-speed Cowboy Action Shooting stage, demonstrating expert transitions between a lever-action rifle, dual single-action revolvers, and a side-by-side shotgun. It highlights efficient manual shotgun reloading techniques from a belt carrier, showcasing advanced proficiency in competitive shooting disciplines. The video emphasizes speed and accuracy across multiple firearm types.

This video provides an expert-level demonstration of the Mosin-Nagant M91/30 PU Sniper rifle. It covers visual inspection, the proper loading procedure for 7.62x54R ammunition, and live fire at an outdoor range, showcasing bolt manipulation and recoil control. The demonstration is presented in a silent, ASMR-style format by an authoritative demonstrator.

This guide details the complex process of reboring a Winchester 1885 Low Wall rifle from .32 Rimfire to .357 Magnum, addressing a pitted bore. Expert gunsmith Larry Potterfield demonstrates disassembly, barrel removal, specialized reboring at Delta Gun Shop, chambering, crowning, action conversion, and final marking/finishing. The process highlights advanced machining techniques and specialized tools required for such a conversion.

This guide details the cycle of operation for the Winchester Model 12 shotgun, as explained by Larry Potterfield of MidwayUSA using a cutaway model. It covers loading, safety engagement, firing, extraction, and chambering. The explanation highlights the hammerless pump-action design and internal component interactions, offering valuable insights for gunsmithing and understanding firearm mechanics.