Really nice foregrip for the money. may wobble on you though - UTG Pro Ambidextrous 5-position Foldable Vertical Foregrip

i had to keep tightening the provided allen screw beyond what i felt was comfortable to get it to tighten down on my plastic picatinny rail. The plastic gives some whereas the metal rails not so much. It was looser on aluminum rail. With plastic rain and careful tightening i feel it it 95% tight. a tiny bit of lateral moevement but not enough to make me concerned it will fall off. it not fo this i would give 5 stars.