 Cane guns are now very rare and difficult to find, since most fall foul of legislation prohibiting concealed weapons, and period examples, where permitted, are, generally speaking, in the hands of private collectors and museums.Modern, cartridge-type cane guns are usually fitted to fire large, low-pressure (black powder or equivalent) handgun ammunition or shotgun cartridges between .410 like the 12-gauge, both of which are well suited in a weapon that is effectively just a barrel with integrated chamber, a manual ejection, a detachable firing mechanism, a rudimentary grip and, in some cases, even more rudimentary sights.Other types of cane guns have been produced as air weapons, generally using some form of detachable pressurized air reservoir (a pneumatic air weapon) in the form of a flask, or integrated into the form of a more generously proportioned stick, such as a traditional shillelagh.