Has this been thought up before? Basically a 30 round "shell" over a ten round only magazine. You could have lances punched in the body at the same spot the LAR mags have their baseplate positioned. Then the tabs at the bottom of the mag are removed so you could not put a baseplate in place (this would be an extended shell basically). A modified baseplate would be required and fit up into the mag body. The plate would have to be tilted initially to fit by the lances, then placed level. Follower and spring would have gone in first.




















































