I will submit that a good light is a very useful item on

by mcassill, Saturday, February 09, 2013, 20:43 (4250 days ago) @ rob

a carbine. Gotta be able to see the target to engage it, and it helps if the target is too blind to return fire effectively. A small Surefire is adequate; if you really want to light stuff up Surefire even offers a huge light made for mounting on a Ma Deuce.
I like good optics these days (I really like the ACOG, FWIW); with the FAL the issue sights are nicely down out of the way when using whatever optic, without any need for folding stuff. A forward pistol grip, I think, is mainly useful for better control of weapons that have that third position for the selector lever. Most of the other crap people hang on M4 copies isn't needed, or just gets in the way.