The Nuprol Vertical Grip is a Vertial Foregrip designed to give the user an extra control point on their weapon. The foregrip is constructed from Polymer and is designed to fit 20mm RIS / RAS Rails. The grip is secured tightly onto rails by first sliding it on then screwing the bottom until it is locked in place. The grip can be placed anywhere up and down a Quad Rail, and is designed to allow the user to chose where the aditional control point on their weapon is placed. The further forward the grip is placed the slower the barrel will turn, and the further back the grip is placed the faster the barrel will turn. This is the perfect purchase for those Airsofters who want to add a bit of flair to their weapon, or want a grip on the front of their weapon.