Videos tagged with Carrier Bore

This guide, presented by Chad Albrecht of School of the American Rifle, details the proper cleaning of an AR15 Bolt Carrier Group (BCG). It emphasizes avoiding aggressive scraping tools that can damage critical dimensions, instead recommending chemical solvents and non-abrasive tools like cotton swabs and nylon brushes. Proper lubrication is highlighted as more critical than extreme cleanliness for maintaining the BCG's function.

This video provides a detailed inspection of a Lantac Bolt Carrier Group (BCG) with a nickel boron finish. The instructor meticulously checks various components, including the bolt, carrier, gas rings, firing pin, and extractor, using specialized gauges and a borescope. Key findings include a smooth finish, slightly gas-inefficient dimensions, and a rounded cam pin designed to reduce receiver wear, though the instructor expresses skepticism about its effectiveness.

This comprehensive physical inspection of the Forward Control Designs (SBCG) Bolt Carrier Group highlights its robust construction and attention to detail. The review covers critical checks including gas ring tension, firing pin protrusion, extractor function, bolt tail and carrier bore gauging, and headspace. The use of Aux Ox carrier key screws and Psionics staking method are noted for their security. A borescope examination reveals a very smooth internal finish, particularly in the gas ring and bolt tail runs, indicating high manufacturing quality. The reviewer concludes with a highly positive assessment, noting the BCG passed all checks with flying colors.