This AR-15 GEN2 under foream Picatinny rail for standard AR-15 A2 handguard and vertical fore-grip combo is a perfect addition to your AR rifle. This A2 handguard vertical grip and Picatinny MIL-STD 1913 rail with more mounting holes for flexible mounting and increase ventilation on your A2 handguard. The ends of the rail have been rounded off for more comfort and to make it less snag prone. The GEN2 Rail is tapered to match the handguard taper of the standard GI carbine and M4 handguards. The taper in the rail will make accessories mounted to the rail parallel with your bore. GEN2 Rail Is Black anodized aluminum construction and includes two mounting screws and flanged nuts. Allen wrench tool also included. Rail Length: 5.9".