Tag Archives: TopBottom

AR-15 9mm drop in mag well blocks. Top/Bottom load comparison

The difference between Top load and Bottom load Hahn drop in 9mm Mag well blocks for turning an AR15 lower in .223 into one that can shoot 9mm.
My 2nd video is here https://youtu.be/YHOscRGGGKc I answer the questions viewers have asked me in more detail.