This full metal rail is awesome! An excellent option if your not looking to spend the money on a whole RIS system. It fit very nicely onto my G&G cm16 hand-guard. The rail has two screws that go into two washers through the holes in your hand-guard. The rail has a slight angle to account for the slope of the hand-guard to make the rail flat. Be sure to look at the way the rail fits going both ways, or you may end up very frustrated.
Full metal construction
Includes allen wrench
Fits both a foregrip and flashlight easily
Angled design to ensure the rail is flat
Hasn't broken or fallen off after 4 or so games
Very nice box
Handguard needs modifications (You would have to saw out one of the spaces in the holes of the handguards. Like the spaces between the holes. What I did was, I heated up the plastic with a lighter and then just used scissors to make an initial cut, then used an X-Acto blade to cut out the rest.
Rating: [4 of 5 Stars!]