Paquete de 4 rieles picatinny de 20 mm de anchoIncluye todo lo de la foto principalSi tienes un handguard sin riel, esta es la opcion!Total Length:65mm/2.56"(Mounting screw center-to-center Distance approx. 30mm/1.18")Total Length:84mm/3.3"(Mounting screw center-to-center Distance approx. 40mm/1.57")Total Length:104mm/4.09"(Mounting screw center-to-center Distance approx. 60mm/2.36")Total Length:124mm/4.88"(Mounting screw center-to-center Distance approx. 80mm/3.15")