12 Gauge; Long range (0.700) tubes; A wonderful choice for Geese, Long Range Ducks, and situations where you might need the extra range to get a clean kill; Compatible with lead, steel and other non-toxic shot; Patternmaster's Coil Zone gas over constriction technology (US patent #8,276,30); An effective range up to 60 Yards; Made from aircraft quality 17-4ph stainless steel; Powder coated with a Military-Spec, Chemical Agent Resistant Coating (CARC); Note: Not for use with slug ammunition