This Wilson Combat Vertical Forend Grip is a lightweight and compact vertical grip that will easily attach to any picatinny rail system. It is lighter than many polymer foregrips and has a small, compact footprint that offers enhanced grip but doesn't get in your way. FeaturesMounts Directly To A Picatinny RailMachined From 7075-T6 AluminumMil-Spec Hard Anodized Black Finish3" Long x 1 1/4" Diameter