I'd much rather see the ability to use carry-sized magwells. Not the big honkin' Limited or Open-sized magwells, but something that's still theoretically carryable. I don't know the best way to specify it, maybe a maximum width and length for the magwell, or maximum width more than the factory magwell? And making it so the gun still has to weigh under the 45oz limit will help to limit the size of the magwell somewhat.