Survivability is enhanced throughout the addition of assorted modular armor security strategies for both the M60's turret and hull. The upgrades involve armor safety with STANAG 4569 Amount six security plates on the frontal arc, passive and reactive armor panels and aspect skirts and slat armor added for the bustle, https://hoytmachineguns.com/product/lot-1496-rock-island-armory-m60-machine-gun-class-iii-nfa/