DMR means marksman rifles, right? I'm confused, one of the missions requires 70 kills with a DRM that has 5 attachments, but all the marksman rifles in the list only have 3-4 slots. Or does DMR mean something else? You'd think they'd use consistent names for things, but I guess not.
e: apparently new slots unlock later on, but I tried a game or two with the MK2 and it was so fucking dreadful that I won't even try this mission lol. It's incredible how shitty and annoying the game gets when you're using anything but a full-auto weapon or a shotgun.