Forward vertical grip, with the added bonus of a spring loaded retractable bipod. Twist the legs, and super strong spring "Ejects" the bipod from the bottom of the grips. Functional, and great for displaying your M4 replica Rifle. This hand filling unit is a very strong and secure attachment capable of supporting the entire M4. The Gun Grade Polymer and steel construction is robust. This unit has a quick release lever; It installs and removes in seconds. This handgrip is also capable of folding when in the forward most slot on the underside rail, and offers a forward grip feel like an M4 mounted with an under barrel grenade launcher! Due to the strength of this accessory, it is suitable for REAL firearms.