The Carlson's Choke Tubes 09217 Bismuth Bone Buster Benelli Crio/Crio Plus 20 Gauge Extended Range choke is crafted from 17-4 stainless steel to deliver durable performance in Benelli Crio and Crio Plus systems, providing a reliable upgrade for field and upland shooting with 20 gauge shells. This extended range constriction measures .040 and is designed to optimize long-distance pattern density without sacrificing consistency, enabling tighter, more practical patterns at practical distances for birds and small game. The choke tube is engineered to fit Benelli Crio configurations, ensuring a precise alignment and easy installation, while the single included choke simplifies maintenance and setup. With its stainless steel construction, it resists wear from repeated use in the field and withstands the rigors of hunting environments, cold starts, and rapid shots. Whether youre chasing woodies across a marsh or chasing quail on a rolling prairie, this Carlsons choke tube helps maximize your shotguns effective range, enhances shot string control, and supports consistent, ethical shooting by delivering dependable patterns with compatible 20 gauge ammunition.