Throughout the MI:2 movie, we are introduced to a variety of handguns. Now, I know that they flashed by fairly quickly, but the handguns used by the main actors were pretty user-specific. Hunt used Berettas, Ambrose was using a custom Colt .45 (I think), and Stamp had his hand on a new polymer pistol that was just appearing when the movie released. Now, guns exchanged hands a couple times, but in the final shootout/motorcycle chase, Ambrose is firing his .45 and Hunt is blazing with his B. When they hit the sand in their motorcycle face-off I can't tell if they have guns drawn or sheathed, but after they jump off their cycles and collide, one of them drops their gun. However, when hunt kicks the gun into the air and blasts Ambrose in the very end, Hunt is firing an HK model USP. Whether it's a .45, a .40sw, or a 9mm I don't know. But the gun is definitely an HK USP. The only reason for using this handgun is that you actually can bury it in the sand, pick it up and fire it, and not have to worry about it blowing up in your face.