Videos tagged with PSA Lowers

This video demonstrates that polymer AR-15 lower receivers are significantly less durable than aluminum ones, failing under a single impact. An aluminum PSA lower receiver withstood repeated heavy impacts against a wooden post without functional compromise. The speaker highlights that the small cost difference ($20) makes aluminum a superior choice for durability.

This AR-9 build faced significant reliability issues, particularly with ASC and C-Products magazines when loaded with an even number of rounds. The problem was traced to the feed lip geometry interfering with the last-round bolt hold-open lever. While upgrades like a longer barrel and better brace improved handling, the inherent blowback action remains jarring. Potential fixes include a new bolt carrier group or retiring the build.