https://www.polygon.com/2018/4/26/17284744/pubg-patch-1-2-notes-gun-balance

Since its official release back in December, there haven’t been many gameplay changes in PlayerUnknown’s Battlegrounds’ patches. But, that’s all about to change thanks to patch 1.0 update 12, which includes the biggest and most sweeping changes PUBG has ever received.

According to a developer post made by developers PUBG Corp. last week, this patch is an effort to reshape the way players think about guns in PUBG and an attempt to give each class of weapons a slightly more defined role. On top of all these weapon balance changes, PUBG Corp. also tweaked some of the loot spawning in the game, and even added a new muscle car to the Miramar map.