Cheap option in a pinch - FAB Defense Standard Picatinny Rail for AR-15/M4/M16 Handguards

Not bad for the price. The angle that creates a parallel plain with the barrel is a nice touch. It looks a little off once installed. I am going to keep it installed, but if you're on the fence, I would just keep the regular handguard look. The vertical foregrip I installed is nice and perpendicular, but it allows me too much torque and creates a lot of give with the handguard (as it wasn't designed to experience it like that). That being said, if you really want to attach to this style handguard, I like the piece.