Absolute best vertical foregrip for the money - MFT Push Button Quick Detachable Vertical Grip

The simple design fits really well in the hand and has an effective pinky-finger rest. I like the waterproof internal storage cap better than the screw off type (most of which removes it from rail after unscrewed). It was a TIGHT fit to rail at first. Have to use a little extra force to slide it on and move it at first, but it breaks in easy and remains tight with absolutely no wobble on the rail.
Pros: Price, fits hand well, quick detatch, durable polymer, tight fit on rail with no wobble, storage compartment's design
Cons: basic design lacks some extras others may desire

This review was written in the old system and had content requirements that are different than reviews written today.