Precision Armament Accu-Washers & Organization Tip

Mike Mihalski of Sons of Liberty Gunworks explains the critical process of timing muzzle devices for suppressor hosts. He strongly advises against crush washers, advocating for the use of shims to achieve concentric alignment. Mihalski provides a practical technique using shims as a feeler gauge to estimate the correct torque window, preventing over or under-torquing which can damage the barrel or lead to device loosening.

This guide details the correct procedure for installing a muzzle device, emphasizing the critical importance of proper torque to prevent bore constriction. Experts from Brownells and Sons of Liberty Gun Works demonstrate how overtorquing can negatively impact firearm accuracy and provide a recommended torque specification of 30 ft-lbs for 5.56mm barrels with 1/2-28 threads. The guide includes a practical bore check method using a punch to confirm the absence of constriction after installation.

This guide details the installation of the Palmetto State Armory Sabre Builder Set, focusing on completing the upper receiver and attaching the QDSM M-LOK rail. It covers critical steps such as torquing the barrel nut to 50 ft-lbs, correctly positioning and torquing the gas block to 30 in-lbs, and securing the handguard with its specific screws to 30 in-lbs. The video emphasizes using the correct tools and torque specifications for a reliable firearm build.

This guide details how to install a muzzle device on a BRN-180 upper receiver, a process that differs from traditional AR-15 uppers due to its trunnion design. The video demonstrates securing the receiver in a vice using padded jaws and then threading on the muzzle device with a crush washer, emphasizing proper torque application. It also briefly mentions an alternative method for stubborn devices involving barrel vice jaws.

This guide provides expert instruction on preventing baffle strikes by ensuring proper suppressor alignment. It details the use of suppressor alignment rods with various firearms, including the KRISS Vector and AK platforms, emphasizing the importance of checking concentricity after installing muzzle devices and suppressors. The instruction highlights common pitfalls like misaligned barrels and the risks associated with multiple thread types.

This guide details the proper techniques for assembling AR-15 upper receivers, emphasizing the correct tool selection to prevent damage. Instructor Chad Albrecht of School of the American Rifle highlights the critical importance of using tools that engage both the upper receiver and barrel extension for barrel nut installation, and barrel-holding tools for muzzle device work. Improper tool usage can lead to catastrophic failures like sheared index pins and unthreaded barrel extensions.

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.