The fairly new division for smallish pistols people really do carry is a ton of fun. The dimensional limits are basically, the size of a Glock 19/23. In that I'm rather partial to 1911's, it seemed to me that there must be a better idea, and here is mine. The magwell started as a stock Smith and Alexander officer's frame magwell. After milling half the base of the casting, I get a functional magwell and fit the "box" dimensions.