The wallet, in and of itself, is a benign piece of folded leather. The minirevolver is a time-tested, high-quality small firearm but, when you join one with the other, watch out! _ you've just created what ATF defines as 'any other weapon', a rather nefarious classification which includes pen guns, cane guns and other disguised weaponry. While legal to own, AOWs require registration and payment of special taxes similar to those for fully-automatic weapons. Possession of an AOW without meeting these requirements subjects the holder to a felony charge (which further exposes us to the liability of a lawsuit).
The distinction between the WH and the folding holster grip or the belt buckle, as it has been explained to us, is that the WH weapon is operable from its disguised state (no need to remove it from the wallet in order to fire it). Both the HG and BB require that the gun be additionally manipulated (opened, removed) before it is functional, and so suffer no 'special' classification. The WH was a very popular accessory and it's a great disappointment that we're unable to offer it for sale.