When I was stationed at Ft. Campbell back in the mid '70s we had two MP companies, the 553rd and the 101st. The 553rd was strickly for garrison duty. The 101st MP Co., which was my unit,  split its time between garrison duty and infantry support. We were the grunt MPs.
     Our primary duties were such things as traffic and prisoner control, but we were also expected to be able to fight along side of the infantry when ever needed. Consequently we often trained with them.
     Being infantry support we were lightly armed. We had no mortars, heavy machine guns, etc.. Most of our people had M-16s with M-203 gredade launchers. Because we were MPs we all had the benefit of having sidearms. Our females carried 38 revolvers  (girls guns... ugh) and the guys carried the Colt 45 M-1911. I can think of no side arm I'd rather carry. It was reassuring having such a capable back up weapon.
    Our platoon did have a little extra fire power. We had an old WWII style bazooka. Though obsolete against a modern main battle tank, it would take out just about anything else. We were glad to have it.
    We also had an M-60 machine gun. That was my weapon. For a 24 lb package it put an amazing amount of fire power in the hands of a single soldier. Though supposedly a crew served weapon I had no problem handling it by myself. The only time i ever had an assistant was when i was in a fixed position guarding a perimeter. The M-60 would shoot big 7.62 rounds downrange to the tune of 650 rounds per minute. It has a muzzle velocity of 2800 ft/sec and an effective range of 1200 yards. Though much heavier to hump than an M-16 I never minded its 24 lbs.
    All of this has absolutely nothing to do with anything but hopefully someone found it interesting.

Jack Reacher was also 101st MP. Pretty good series by Lee Child.

I bet soldiers are hankering for exosuits to support the lower back (Once battery issues and are solved et cetera). I imagine soldiers are going to love them in the future.

11 kilograms for a m60 alone is heavy, but I imagine that the ammunition required for sustained fire would be pretty damned heavy too. Then you have all the other bits like rations, water et cetera.

With some of the configurations issued to active military personnel today you can certainly see how it can do significant damage to soldiers backs in the future. Combining all the weapons and ammuntion plus essentials with the addition of possibly ceramic or metal plate inserts and kevlar garments depending on situation... 

Of course, some of those inserts can stop several 7.62x51mm rounds, so I imagine there is some love for them despite the weight.

Steel pots weighed 2.8 pounds, including the liner and cover.  PAGST helmet weighed 3.1 pounds for an extra small to 4.5 pounds for an extra large.  Most people wore a medium which was over three pounds.

Plus, the PAGST was supposed to be level 111A and able to stop a rifle bullet.  (It wasn't.  They made the first 1 million+ wrong.  They still issued them, anyways.)  It also had the nice little side effect of focusing the blast wave on the back of the brain if you were facing an explosion, giving the wearer TBI or Traumatic Brain Injury from relatively small explosions... Other than that, it was way more uncomfortable than the steel helmet because the lining was really poorly designed.  Most people ended up adding stuff to the lining to keep the top of the harness from digging in.