We all know what happened with the Fedorov MG, as it was more recently brought in line with the rest of the MGs. The same needs to be done with the Browning M1918, It needs to be given the movement penalty like the rest of the MGs and have its weight adjusted to 8.4 Kg to match that of its real life counterpart.
This would not only reflect more closely on a more realistic nature for the weapon, But it would also put it more in line with its actual BR. I would then reduce the first Browning in BR III to BR II. This would give a balance adjustment similar to what we saw with the Fedorov MG, which should also receive a BR adjustment in place of its recent modification.
This would take the next step towards unifying weapons in the MG class to all utilize the same mechanics.