Kharn
Ultimate Member
You can get the blackout magpul mag at Cabella. It cost a little bit more but has the lettering on it. You can use a permanent color marker and mark it. Bright pink color will do so that you don't make a mistake. We don't want you to come back here complaining!
The 300bo mag also has raised ridges on the front and back edges so it is obvious by feel.
