Working on a CAR/M-4 type rifle, got my fixed folder, got my red dot scope, trading barrels with a guy for a 11.5" with the fixed 5" break. The object of my project is a small tactical multipurpose self loading rifle for an urban environment to suppliment my Ishapore Enfield .308 scoped sporter and my 11-87 12ga.

I'm curious about the various forearm accessories, including a tac light, laser, and virtical fore-grip. What's worth it, what is just extra weight?