It's a special model made specifically for Gander Mountain. Here is a link to it: Gander Mountain® > Browning Buckmark Tactical with Rail .22 LR Semi-Automatic Pistol

Providing that your state does not have a handgun roster like Kommiefornia you could probably pick one up either directly from them or second-hand via Gunbroker I would imagine. Goddess, I'd love to get one myself but unless someone is willing to buy one and do a barrel swap there is not a chance in Hades.