Does anyone know if the Knoxx Copstock/Specops stocks go on the 20 gauge versions of the Mossberg 500/ Remington 870/ Winchester 1300 series, or only the 12 gauge versions?
Mossberg uses the same receiver for both the 12- and 20-gauge shotguns so the Knoxx Stock will fit perfectly. Note that the Knoxx forend will not fit the 20-gauge.
