Videos tagged with Cam Pin Hole

This guide, presented by School of the American Rifle, details common AR-15 bolt failures, including cracks at the cam pin hole and broken locking lugs. It emphasizes thorough inspection during cleaning to identify potential issues like warping that can cause firing pin binding, leading to 'click no bang' malfunctions. Proper maintenance can prevent catastrophic failures in the field.

This video provides a detailed inspection and gauging procedure for two BCM Bolt Carrier Groups (BCGs). It covers essential checks like gas ring seal, bolt face recess, cam pin hole slop, firing pin protrusion, and headspace. The instructor demonstrates the use of various specialized gauges to identify potential issues and ensure proper function, offering insights into wear patterns and material finishes.

This video from School of the American Rifle showcases several problematic AR-15 components submitted by viewers. It highlights issues like bolt separation at the cam pin hole, case head separation in a 9mm barrel, a broken upper receiver due to improper tool use, a damaged barrel from attempting to remove a front sight base, a malfunctioning nickel boron bolt carrier group, and a barrel with a pin drilled into the bore. The instructor emphasizes the educational value of these failures for future classes and promises follow-up videos on diagnosis and repair techniques.

This video discusses the HTM Defense HMB Bolt, an aftermarket AR-15 bolt designed to enhance strength by not milling the cam pin hole all the way through. This modification aims to address common failure points in standard AR-15 bolts, particularly around the cam pin area, by increasing the material's circumference and thus its resistance to stress during operation. The presenter intends to test this bolt in a high-stress rifle over a year to evaluate its durability.