Were those brought to market so that USMC would buy them by the gazzilions, in order to feed the IAR automatic rifle? I'm guessing yes....
And why the heck did MagPul make their 20-round mags even bigger? I need to find more of the original MagPul 20-rounders since I just don't see the need for the ones that approach the size of 30-rounders.
“There’s a rattle in my glove box,
A Federal twelve-gauge slug.” – Adam Carroll in song Porter Wagoner