It is a heavy sucker but I never thought of it as a squad weapon. The M60 got to be too much, hence the M249 SAW (a cautionary tale in itself in the development of a new weapon system).
The weight of the .50 ammo itself is daunting. Carrying enough to be useful is a job for several troops. All things considered it is something to be carried or mounted on a tactical vehicle, not on a soldier’s back. Even the titanium version.
My Scout squad had to carry one of these pigs often. One man got the receiver, one man got the tripod, one man got 2 barrels and one poor sucker got the ammo. This was on top of our regular issued weapons and ammo, water for 3 days and a radio with extra batteries and 80 lb. rucks. Not always fun sneaking through the mountains with all this to set up an OP/LP.
Still was better than lugging the Mk19.