AR Touchup Chemicals - Aluminum Black & Cold Blue

This video from Brownells provides a practical demonstration of applying different cold blue products to firearms. Steve and Caleb highlight that results can vary based on the metal type and recommend specific products like Oxpho Blue, 44/40, and Dicropan T-4. They emphasize the importance of oiling and neutralizing the finish afterward, and suggest using 0000 steel wool for smoothing.

This guide details the process of removing the hammer spur on a Smith & Wesson revolver, a common modification for a snag-free draw during self-defense. Expert gunsmith Larry Potterfield demonstrates the use of specialized tools like a Dremel and Cratex wheels, emphasizing careful disassembly, precise cutting, and finishing with cold blue. The procedure requires advanced gunsmithing skills and attention to detail for a successful outcome.

Larry Potterfield of MidwayUSA provides an expert guide on modifying a Smith & Wesson revolver by removing the hammer spur. This process, detailed with specific tool usage including rotary tools and finishing attachments, aims to improve handling and aesthetics. The guide emphasizes careful disassembly, precise modification, and proper reassembly with cold bluing for a professional finish.

Larry Potterfield, founder of MidwayUSA, demonstrates an expert technique for filling unsightly screw holes in firearms. This method involves preparing the hole with a chamfer tool, annealing and peening screws to fill the void, and then filing, polishing, and cold bluing the area for a seamless repair. This guide is suitable for intermediate gunsmiths looking to improve the aesthetics and value of their firearms.

This guide details the process of cold bluing a firearm barrel, a technique primarily used for touching up small scratches and blemishes. It emphasizes meticulous surface preparation, including cleaning and light heating, followed by the application of cold bluing solutions like Birchwood Casey Perma Blue or Brownells Formula 44/40. The process concludes with neutralization and oiling to protect the new finish. Instruction is provided by an experienced gunsmith from Iraqveteran8888.

This guide details the process of applying cold blue finishes to firearms, as demonstrated by Steve Ostrem, a technical expert from Brownells. It covers proper cleaning, product selection for full refinishing versus touch-ups, application techniques, and crucial neutralization steps to achieve a lasting finish. Proper surface preparation and understanding metal alloy reactions are emphasized for optimal results.

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.