I also hear good things about the magpul drum. I run the big stick with Goliath basepads which is plenty for me and never had to change mags for a stage butni might look into the drum just so my mags are mot long
Started out as a joke for my ruger mark3 22/45 lite. That big window on the 510c feels good. Wondered if anyone tried this or know anyone selling a lower mount?