The Perpetual Agony of the AR-9
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.









