Military Issue USA made rifle butt receptacle: Made from heavy-duty rubber. These are made to mount on floor of Humvee or other vehicle to accept the butt of a rifle. Also works well for bumperette. New condition. Genuine Issue. Measures approx 5 3/4 inches wide x 1 3/4 inches high from bottom to top lip. Inside measurements are 5 1/4" wide x 1 inch high.