1. Carry a smaller caliber-less effective, but more efficient weapon and less of the smaller caliber ammo!
Once the range & perforation power requirement is reduced to something realistic, you quickly find out that the weight of the weapon and it's ammo can be reduced drastically!

1A. Up load the range requirement to a higher command in the form of Satcom & Brilliant, not just smart weapons.
Fire on my section from beyond my so called "effective" range, and I'll Nuc your hill top or buildings with FAEs and Individually targeted smart munitions with 100% Lethality and redundancy to guarantee a 100% fatality rate of the bad guys.

2. Reduce the protection of the Body Armor System to something that works 80% of the time at 300 meters range for ALL field missions and save the even heavier up-armored stuff for urban and close quarters battle.

Our armor could be 100% effective at stopping rifle caliber Hard Core AP projectiles for less than 2/3rds of it's present Mass, IF that projectile had already traveled 400 meters and loss some of it's power.

To prevent our enemies from doing the same to us, we can either buy more expensive ammo to defeat well healed National antagonists, or use soft point bullets vs the IFT-Jihadist element!

The second group is not accorded coverage and the protections of ANY of the many international conventions governing the Law of Land Warfare and if it is acceptable to shoot our own citizens with such projectiles, why not Godless savages who murder women and children to maximize their news coverage?