Improvement on Stern Defense mag adapter

[MoRivera]

Yeah, that's kinda' why I wish Stern made an adapter that works specifically with a CMMG Radial Delayed Blowback upper, just to have some more options with Glock-based mags, especially configurations over 30-rds...without having to buy a 'dedicated' CMMG lower.  I know you can modify the mag catches on some lowers like a Foxtrot Mike to work, but I haven't really read about much great success or reliability with that.