We could add a suppressive fire ability instead of auto suppression.
The M1918A2 BAR was pretty average on paper and wasnt really a true lmg, it was heavy (9.5kg!) and only had a 20 round mag.
It also had selective fire, both automatic but one “fast” (~600rpm) and slow (~350rpm).
It did have a bipod so you could implement a prone only suppression ability that might balance it out?