Home Forums Hunting & Shooting AR and Tactical Rifles Colt 6720 and what light?

I picked up a Colt 6720 a few months ago, and really like the setup. Nice and lightweight.

I would like to add a light to it, but want to keep it slim and lightweight. Are there any good options out there that are lightweight and can be used without having to swap to one of the railed forends?

Thoughts?

Thanks,

Dan