I think I understand that rule about 'once a rifle always a rifle' but let's say you own a Crosman 2250 and occasionally want to shoot it without the stock, it would look awfully like a pistol but be over the limit for a pistol. Is this really ok to do something like this? If it's all down to whether it says 2240 or 2250 on the receiver of a modded build this could mean that virtually identical builds would be legal in one case and illegal in the other. I can't somehow believe that it would be ok to build a special based on a 2250 and crank it up to 11ft/lbs and occasionally use it in pistol form