Super lightweight handguard - Midwest Industries G3 Lightweight LWM-Series One Piece Free Float Handguard, M-LOK

There isn't much to say. This rails weighs nothing, its small diameter so I can wrap my whole hand around it, its sturdy and installation is easily as far as these things go. Only two issues are that I used a Battle Arms Development upper receiver and the anti-rotation tabs on the handguard need to be filed down to fit. That and there is pretty much nothing between your hand and the gas tube. Wear gloves to avoid getting burned.