A rubber panel attachable to a rail system of a firearm is disclosed herein. The rubber panel may include an elongated body comprising a first side, a second side, an upper edge, a lower edge, a first end, and a second end. The rubber panel also may include a gripping surface disposed on the first side of the elongated body. Moreover, the rubber panel may include at least one attachment protrusion disposed on the second side of the elongated body.