https://www.gamespot.com/articles/pubg-pc-update-now-out-on-test-server-adds-new-veh/1100-6460472/

PUBG Corp. continues rolling out a regular stream of new updates for PlayerUnknown's Battlegrounds. Patch #18 for the PC version is now available on the game's test servers, and it introduces a new Sanhok-exclusive vehicle and weapon, along with a handful of other features and tweaks, to the popular battle royale game. [Update: PUBG Corp. has confirmed that Patch #18 will be rolled over to the live game tonight, July 18, following a four-hour period of server maintenance that begins at 6 PM PT / 9 PM ET.]

The aforementioned weapon is the QBU, a new DMR that only appears on the smaller, tropical themed Sanhok map. It takes the place of the Mini 14 on Sanhok and uses a standard, 10-round magazine of 5.56mm ammo, which can be increased to 20 rounds with an extended magazine.