This plug custom designed and molded specifically for the Kel-Tec RDB Rifle grip. Other plugs sold elsewhere don't fit correctly, and don't match the contour of the grip and eventually wont stay in, or are made from very soft rubber snagging on everything etc. We have developed this plug to match the grip perfectly, plug the cavity of the grip to prevent debris from lodging in the cavity and to function as a shock absorbing pad to protect the grip from hard surfaces or impacts. Plug Also provides an instant secure storage compartment inside the grip cavity. This is the Grip Plug you have wanted and been waiting for - this is the proper plug your Rifle Deserves. Designed, Manufactured with pride in USA!