Winchester Ammunition Defender, Supreme Elite, 12 Gauge, 2.75, 1 oz. Segmenting Slug, 10 Round Box S12PDX1S PDX1 Defender 12-gauge ammunition features a distinctive black hull, black oxide high-base head and a 1oz segmented rifled slug. Upon impact, the slug breaks into three equal segments. This unique design is applicable for short and long range situations.