>>64114017
Oh, sick. That’s what I would do as well lol.

Or 22 APG
Or 5.56 MARS
Or 5.56 MINSAS
Or 6x35TSWG if you have big hands

Picrel is something I sketched up. The cross section of a grip at its thinnest point where it interfaces with the web of your hand. Red is the magazine, assuming 1mm wall thickness, made of steel. White is the grip. 1mm thick at the front strap, assuming it’s made of aluminum. Total grip width 1”, total grip depth 2.15”. The cartridge length is 1.8” and the case head diameter is .393 (10mm). I think it can work. The whole thing is made of graceful curves with no real sharp edges, and the overall size is very manageable - it’s like a hair deeper than a Glock 20 grip.

When I model that cartridge in the powley computer at 80kpsi, it projects a muzzle energy of >1050ft*lbs from an 8” barrel (.257 bullet, 0.9” long). Not a good pistol cartridge, but a great mp7 cartridge.