InGen mercs use Black multi-cam and have an array of weapons that can be seen in real life, ACR, KSG, modded M4s, M249s and the likes. Their vests vary as well, with it not being restricted to black but also multi cam. They use either Caps, ops-core helmets, or boonie hats with some using balaclavas as well. They also carry recording equipment that looks like contour cameras and NVGs.
ACU has a more uniformed load-out, unique in comparison to real world counterparts that may or may not be much alike, all troopers wear customized Kryptek Gunfighter Shirt that is manufactured by Vertex, some troopers use gen 2 direct action shirts as well, both uniforms dyed blue-toned. They all use TacTec plate carriers made by 5.11. Their weapons/eqipment is mostly made up of CODA Netguns, Stun Rifle(which seems to be loaded with a tranquilizer as well), a stun prod/shock prod, and when they are in need to use deadly force, they use UTS-15s loaded with buck shot ammo, i havent seen any other lethal weapons. Pretty much their weapons are mostly non-lethal.