Winchester Ammunition Defender, Supreme Elite, 12 Gauge, 2.75, Buckshot, 10 Round Box S12PDX1 The 12-gauge PDX1 Defender ammunition features a distinctive black hull, black oxide high-base head and 3 pellets of Grex buffered 00 plated buckshot nested on top of a 1 oz rifled slug. The result is the ideal, tight patterning personal defense load. The slug/buckshot combination provides optimum performance at short and long ranges.