One of the LMGs in the Battlefield 1 beta works very similarly to modern weapons.
Which is a shame, because according to Westie, It's one of the better weapons in the beta. In the video above, Westie picks up the LMG and shows off just how similar it is to modern weapons.
There are two versions of the MG15 N.A. available in the beta, the Suppressive and Light Infantry. Like other LMGs, continuous fire increase accuracy, especially over range, but it does mean the weapon will overheat. It's also very slow to reequip, or switch to from another gadget/sidearm, so needs some management.
You should probably unlock it once you have the Warbonds, if you're playing the Support class.