I have jumped into the .300 game late, and wanted a mag specifically for my .300s. The Hex Mag gives me a nice choice in that they posses both visual and tactile differences so I know immediately I am dealing with my .300 AAC cartridges. Saves me from making a Kaboom! That and so far the Series 2 mag seems the perfect functional fit for my AR platform. I have had ZERO issues with these mags. Should update your picture though, as the series ONE has the extrusion sprue on the front edge (as shown), but these are Series TWO magazines (the improved version) and the extrusion sprue is now on the back spine. Small detail, but details count.