How to Combine the AR-15 Upper & Lower Receivers Presented by Larry Potterfield of MidwayUSA

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 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 comparison and installation considerations for popular AR-15 triggers, including the LaRue MBT-2S, Geissele SSA-E, and TriggerTech Duty. It covers the functional differences between single-stage and two-stage triggers, as well as cassette versus traditional designs. The expert-driven content from Concrete Cowboy provides insights into pull weights, reset, and installation ease, aiding builders in selecting the best trigger for their AR-15 platform.

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 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 details the advanced process of assembling an AR-15 lower receiver, drawing from expert techniques observed in the video. It covers the installation of critical components like the trigger group, safety selector, and buffer system, emphasizing the use of specialized tools and methodical assembly. The builder demonstrates high-level armorer skills, including custom fitting parts for optimal performance.

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.