Videos tagged with Bolt Protrusion

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 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 an in-depth physical inspection of two Young Manufacturing Bolt Carrier Groups (BCGs), one standard and one National Match. The instructor, from the School of the American Rifle, meticulously examines various components, including the carrier, bolt, firing pin protrusion, cam pin, extractors, and gas key alignment. Several potential issues are identified, such as short firing pin protrusion on one bolt and gas key alignment problems on the standard carrier, highlighting the importance of detailed inspection for optimal firearm function.

This video provides a detailed physical inspection of an AIM Surplus Bolt Carrier Group (BCG). The instructor, from School of the American Rifle, meticulously disassembles the BCG, checks for proper fit and function of components like the firing pin, cam pin, gas rings, and extractor. The inspection includes checks for magnetism, bolt protrusion, headspace, and a borescope examination of the carrier's three-bore. While generally positive, the review highlights a minor machining inconsistency in the carrier's rear three-bore, potentially affecting gas efficiency.

This video provides a detailed physical inspection of a new Hodge bolt carrier group (BCG) by School of the American Rifle. It covers the nitride finish quality, firing pin protrusion measurement, extractor and ejector function checks, magnetism testing, and internal carrier bore inspections using a borescope and specialized gauges. The instructor highlights the refined finish of the Hodge BCG and discusses the implications of internal bore tolerances for gas efficiency.