ok so for light get the streamlight STRION led and the Daniel defense side mount. Its perfect because you can manipulate it with your thumb from the hand on the fore grip and doesnt cost as much as one of the streamlight lights that is incorporated into the foregrip... plus it strobes which is awesome and is rechargeable (i actually have an extra one you can have if i can find it, you just need to buy a charger for it which I think are like... 30 bucks on ebay)
::edit::
so youll need:
https://danieldefense.com/mounts-1/o...ght-mount.html
and this: (which i will give you)
http://www.amazon.com/Streamlight-74...ion/B001VVAANO
and youll be golden