What type of gun does Booth gives Brennan in season 2,when he finally gives her licence?

Seeley once arrested Brennan for shooting a murderer who, despite trying to kill her by setting her on fire, was unarmed at the time. Even though she was not convicted, she was still charged with a felony, which meant that her original application for a concealed weapon was denied. In the second season, she was allowed a permit, and later bought herself an oversized gun from a local mall. (Yeah,but what type is the gun?)