Worst Ever BCG AUTOPSY caught on camera. (See description)

This video provides a detailed inspection of three Expo Arms chrome AR-15 bolt carrier groups (BCGs). The instructor performs a series of tests, including checking for proper staking, measuring dimensions like carrier length and bolt protrusion, and inspecting critical components like extractors and firing pin holes. Minor issues such as slightly undersized extractor pockets and a misaligned carrier key are identified, with recommendations for correction. The overall assessment highlights the quality of the BCGs, particularly their internal finish and staking.

This video provides a detailed inspection and partial disassembly of a Palmetto State Armory (PSA) chrome-lined, phosphate-coated M16-cut bolt carrier group (BCG). The instructor meticulously checks various components, including gas rings, ejector, extractor, firing pin, cam pin, bolt face, and gas key staking, using specialized gauges and tools. Key findings include a weak extractor spring, a non-beveled ejector edge, and a failure in the gas key staking during a reverse torque test, indicating potential issues with proper torque application and staking. The instructor plans to replace the gas key, screws, and springs to bring the BCG up to standard.

This guide details a comprehensive physical inspection and testing procedure for a Toolcraft Nickel Boron Bolt Carrier Group (BCG). It covers checking gas ring integrity, carrier bore measurements, gas key staking, borescope inspection of internal finishes, bolt component checks, firing pin protrusion, and headspace. The process highlights potential issues like excessive wear, uneven coating application, and critical dimensional tolerances that can affect firearm reliability.

This video provides a detailed physical inspection of a Bootleg adjustable bolt carrier group (BCG). The instructor examines various components including the bolt, firing pin, extractor, and carrier key, performing critical measurements like headspace and firing pin protrusion. Key findings include poor staking of the carrier key fasteners (YFS fasteners), potential nickel boron coating on the firing pin, and a rough bolt face. The video also demonstrates testing the integrity of the YFS fasteners under torque and checking for gas leakage.

This guide details an attempt to install an AR-15 trigger into a Derya Arms DY12 12-gauge shotgun. The process involves disassembly, fitting the AR-15 trigger, and reassembly, followed by a functional test. The video highlights potential compatibility issues due to differing internal designs, specifically the hammer mechanism and pin configurations, ultimately concluding that the AR-15 trigger is not directly compatible.

This video announces a new service from School of the American Rifle offering physical inspections and 'autopsies' for AR-15 style bolt carrier groups (BCGs). For a fee of $40 labor plus shipping and processing costs, customers can send in their BCGs to be assessed for proper function, protrusion, and headspace, receiving a detailed health report. The service is limited to AR-15 platforms and requires specific payment and packaging instructions.

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 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.

This guide details the autopsy and repair of a Black Rain Ordnance SPEC15 AR-15, focusing on tuning an over-gassed system. Master Gunsmith Chad provides expert-level instruction on replacing key components like the gas tube, buffer spring, and firing pin, using specific torque values and materials like Loctite 620 and Rocksett. The process emphasizes achieving a reliable 4:00 ejection pattern through meticulous adjustments.