I came up with one of these (long and full stocked) about a year or so ago so I pretty much know what it is. First I checked to Feds regs and they require 18" bbl. this is 19" and 26" OAL, this is 30" so should be legal?! It's a Geha, right? Chamber guage measures 2 5/8". The guy I got it from claims his uncle or some such brought it home from WWII and that it was a German prison guards gun, I so don't believe that; but who knows, any comments?