The Carlson's Choke Tubes 09205 Bismuth Bone Buster Browning Invector-Plus 12 Gauge Extended Range 17-4 Stainless Steel delivers precision performance for the discerning shotgun enthusiast, combining Carlson's renowned quality with a purpose-built extended range constriction designed for reliable, dense-bodied targets. This 12 Gauge choke tube features a 17-4 stainless steel construction for durability and corrosion resistance, an Invector-Plus configuration for seamless fit with Browning shotguns, and a tight .040 constriction that supports extended range payload performance without sacrificing consistency. With one choke included, shooters can trust enhanced pattern density and longer effective reach on tough scenarios, whether pursuing birds at distance or engaging other demanding field targets. The Bone Buster design cue underscores its intent to maximize performance with rugged loads while maintaining smooth operation within the barrel threading and collar interface. Ideal for hunters and target shooters who demand repeatable accuracy, this choke tube integrates easily into existing setups, leveraging Carlsons precision threading and finish to promote longevity and dependable chamber-to-shot consistency.