The Carlson's Choke Tubes 09220 Bismuth Bone Buster Browning Invector Plus 20 Gauge Mid-Range 17-4 Stainless Steel delivers precision-adjusted constriction within a rugged Invector-Plus compatible configuration, designed to optimize patterns for their 20 gauge shotgun with a mid-range, .025-inch constriction diameter. Crafted from 17-4 stainless steel for dependable durability, this one choke tube is tailored to Browning Invector-Plus receivers, allowing hunters and sport shooters to tailor shot patterns for waterfowl, upland birds, and clay targets where mid-range performance is ideal. The Bone Buster design emphasizes consistent performance with heavier, high-density shot options, enabling tighter patterns without sacrificing velocity or reliability across typical hunting scenarios. Its stainless steel construction supports repeated chambering and field use, while the mid-range constriction provides a balanced spread suitable for mid-distance engagements. This Carlson accessory integrates smoothly into existing chokes and accessories, offering a straightforward upgrade path for shooters seeking improved pattern density and versatility on 20 gauge platforms without altering other components. Whether refining long-range accuracy at the range or maximizing hit probability in the field, this Invector-Plus choke tube represents a practical, durable choice for serious shooters seeking dependable, mid-range performance.