Originally Posted by lyncher
If you get a box and mount it like the posted pic, you're going to have a problem with it interferring with your scope, unless you get the rings, or mount the box somewhere other than on top of the RIS.
It called a PEQ-2 actually. I already mention that simple way is get PEQ-2 dummy and a high scope mount ring. That would solve the problem easily, moreover; you can either mount PEQ-2 on the side of the rail. It's just personal preference. I like to mount on the top is because it just look cool plus I put my flash light on the right and keep the left empty. I like to keep my gun close to me as possible.