http://www.pcgamer.com/playerunknowns-battlegrounds-confirms-aquarail-jet-ski-r45-six-shot-revolver/

Yesterday, we learned more about PlayerUnknown's Battlegrounds' much-anticipated desert map—including its name and details of its specific regions. Today, developer PUBG Corp has confirmed the existence of the previously rumoured jet ski and R45 six-shot revolver.

As told by Nvidia, the latter is exclusive to the Miramar desert map, replacing Erangel's R1895. Unlike the gun it swaps out, the R45 doesn't support a suppressor. It can, however, be equipped with red dot laser sight.