Installation, Gauging, Fitting, Tips, & Tuning of a 3 AR15 Fire Control Groups

This guide details the installation of the Geissele SSA-E trigger into an AR-15 lower receiver. It covers the removal of existing components, the use of slave pins for easier assembly, and the correct positioning of the hammer and trigger springs. A function check and lubrication are recommended post-installation.

This guide provides an abbreviated installation process for two-stage and drop-in cassette triggers on AR-15 style rifles. It highlights key differences, such as the disconnector assembly in two-stage triggers and the importance of anti-walk pins for cassette triggers. The video emphasizes that installation steps are similar to single-stage triggers, with a focus on ease of use for drop-in designs.

This guide details the advanced assembly of an AR-15 lower receiver, focusing on components that enhance accuracy and ergonomics. Instruction from Brownells' technical expert Caleb covers the installation of specialized parts like the Geissele SSA-E trigger, Radian Talon safety selector, and Law Tactical folding stock adapter. The process emphasizes precise component fitment, including using a tensioning screw to eliminate upper-lower receiver play for improved stability and trigger consistency.

This guide details the process of installing an enhanced nickel-teflon single-stage trigger on AR-15 rifles. It covers the proper installation of the trigger spring, hammer spring, disconnector, and the precise insertion of trigger and hammer pins. The video emphasizes careful handling of components under spring tension and provides tips for a smooth installation.

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 guide addresses compatibility issues between the Radian Talon 45/90 Safety selector and various aftermarket AR-15 triggers, particularly in the 45-degree short-throw setting. It outlines troubleshooting steps, lists known incompatible triggers, and explains the underlying cause of 'tolerance stacking.' The information is presented critically, highlighting a lack of transparency from manufacturers regarding these technical limitations.

This guide details the process of diagnosing and repairing an owner-induced feeding problem in an AR-15 upper receiver, specifically addressing a burr on the barrel extension's feed ramp. Expert gunsmith Chad Albrecht demonstrates meticulous inspection, burr removal, and polishing techniques to restore reliable feeding. The video emphasizes that such modifications, while often overlooked, are valid solutions for specific AR-15 malfunctions.

This guide details a diagnostic technique for AR-15 bolt carrier groups, focusing on efficiency rather than simple pass/fail. Developed by Chad Albrecht of School of the American Rifle, it uses custom gauges and cutaway components to illustrate gas dynamics, critical seals, and potential failure points like gas leaks. This advanced method helps troubleshoot functionality issues and understand the nuances of the AR-15's internal gas system.

This video provides a critical, expert-level inspection of a problematic AR-15 Bolt Carrier Group (BCG) by Chad Albrecht of School of the American Rifle. The analysis details numerous manufacturing defects, including an undersized bolt tail, excessive firing pin protrusion, oversized firing pin and cam pin holes, and a failing headspace check. The content highlights the importance of precision gauging in identifying critical failure points that impact rifle reliability and safety.

This guide details a specialized technique for swapping an AR-15 rear takedown pin without requiring a full disassembly. It leverages insights from Chad Albrecht of School of the American Rifle, emphasizing the use of a modified 1/16 inch Allen wrench or a specialized tool to manage the detent. This method is particularly useful for AR-15 variants with collapsible stocks, offering a more efficient approach to maintenance.