The Troy Industries front grip attaches to any MIL-STD Picatinny Rail without the need for tools. It features an aggressive ridged pattern for an enhanced grip, as well as a handy waterproof storage compartment. This is a great lightweight option for a vertical grip that has been machined from billet aircraft aluminum. The finish is hardcoat anodizing. Color: Black, Gun Model: AR-15 Compatible with any MIL-SPEC M1913 Picatinny rail system