I found a Coast G20 LED flashlight I bought from Homedepot couple years ago for like $8.  it was left in my tool box and still new in the package.

So I got the idea of keeping it inside the battery tube of the Vltor Emod stock since it's a slim 2x AAA powered light.  

it turned out pretty good.

the light itself:


in the tube:


I only needed a small cleaning patch to make up the slack in the tube so it wouldn't rattle.


cap closed

Hmmm, good idea. I like it.