My weapon in Iraq had a Surefire front grip, an ACOG or a Holosight depending on where I was, a Redi-mag that holds an extra mag on the weapon right next to th primary and is released with the same button, and an IZLID 424P IR Pointer. I also maintained the bracket on the top of the barrel for my PVS-14 to mount. The 424P is used to point at targets so tac aircraft flying with NVGs can see where I'm looking. It's also boresighted to the weapon to act as an aiming device at night under NVGs.
My weapon in Afghanistan did have the KNight's suppressor, ACOG, and PEQ-2 with the front grip assembly.