Videos tagged with Clocked Barrel

This video details the cause of a 'clocked barrel' in a PSA upper receiver, which is the barrel rotating within the upper receiver during barrel nut installation. The issue stems from improper fixtures not holding the upper and barrel securely, allowing the barrel index pin to peen over the receiver material. The instructor recommends using the correct tools, such as Midwest Industries rod, to prevent this common assembly error and ensure proper alignment.

This video details the inspection of a PSA/H&R XM177 complete upper receiver, identifying two critical issues: a clocked barrel extension preventing proper seating of components and a significantly misaligned front sight base. The instructor demonstrates how to diagnose these problems using alignment gauges and component fitment, noting that headspace passes but the issues require correction. Potential solutions like oversized taper pins and proper jig use are discussed, emphasizing the importance of thorough inspection before building.