DMRs (Designated Marksman Rifle) are a type of weapon in Battlegrounds.
DMRs, or Designated Marksman Rifles, are weapons between the Assault Rifles and Sniper Rifles categories. Broadly speaking, they've got just short of the range of a sniper rifle, and just slightly higher damage than an assault rifle, albeit with a slightly lower magazine size. Functionally speaking, they're a great short to medium range precision rifle, but they're not that great in assault situations.
DMRs are a big part of our Best Loadouts for PLAYERUNKNOWN's BATTLEGROUNDS, so if you use these weapons a lot, make sure to check out that page. For more tips and tricks, make sure to also check out our How to Play Guide for PLAYERUNKNOWN's BATTLEGROUNDS.