Videos tagged with Bolt Face Gauge

This video from School of the American Rifle announces the re-availability of SOTAR BCG bore gauges, offered in two versions: one with a US-made handle and another with an imported handle. The organizer tray, made by Suppressor Tools.com, is also highlighted as a way to keep these gauges organized. The instructor emphasizes that these gauges are for checking dimensional efficiency within the bolt carrier, not for determining good or bad status.

This video demonstrates a critical quality control check for AR-15 bolt carrier groups: the bolt face diameter. Using a specialized notched gauge, the instructor highlights how undersized bolt faces can lead to cartridge base wedging, preventing clean ejection. Several popular manufacturers' BCGs are shown failing this check, emphasizing the importance of verifying this spec, especially with certain ammunition types.