Magpul Industries RVG Vertical Foregrip, Fits Picatinny, Gray MAG412-GRY Designed for use with 1913 Picatinny railed hand guards" the RVG is a basic" light weight" cost-effective vertical fore grip. Shape is ergonomically designed for use as a traditional vertical grip. It has also been optimized for use with the thumb break method of shooting as taught by Magpul Dynamics. Includes all mounting hardware plus a universal mounting rail for custom fitting to many factory plastic hand guards.