That gun needs to be replaced. If browning was alive and knew it was still being used, first he would feel self-pride, but then as he realized how fucked up it was he would feel abject horror that his nation made no strides of improvement since then.
List of replacements for the 38kg M2 from USA alone:
XM312 (19kg),
LW50MG (18kg),
M85 (29kg),
XM307 (22kg),
Bushmaster .50 (35kg but this is a CHAIN GUN),
and XM806 (18kg) including many other shelved designs and even prototypes dating back to 1930s.
Historically there are superior guns, like Becker Type M2 eeeeeh! :^) don't even need to change procurement lists 20 mm cannon, which is lighter coming in at 30kg and is from world war fucking one so the history fetishists defending M2 can be satisfied. There are also dozens of ally guns available such as MAC-58 (28kg) and RMG.50 (25kg). Not to mention enem- uh… Russian guns which are much lighter, like ShVAK 20mm Soviet cannon (39kg) or its replacement the B-20 (25kg). Even random podunk countries like Tringapore saw how obsolete it was and tried to replace it by directly learning lessons from American experimental programs, building stuff like CIS50MG (30kg), but apparently Americans can't learn lessons from programs their taxpayers paid for.
It also bears mentioning that considering it's usually vehicle mounted, for just a bit more weight (yet in the same rough weight class) you can have a shitton more improvement in fire capability:
MG 151 machinegun in 15mm (42.7mm),
M621 cannon 20mm (45kg),
Gau-19 a .50 three barrel (48kg),
KPV 14mm gun (49kg),
M230 chain gun 30mm (55kg),
FN 15.5mm (60kg) machine gun,
and Rh202 mounted on Wiesel (75kg).