Rob Roberts Gun Works Turkey Choke Raptor Crio Plus 12 Gauge 17-4 PH Stai. This choke is the ideal option when using TSS or lead. It also works great with any length of barrel. This choke features green Cerakote as well as machined claw marks for extra grip. The Raptor Choke Series uses new technology to deliver a hotter core pattern at distances that are sure to impress. Specifications for Rob Roberts Gun Works 200277 Turkey Choke Raptor Crio Plus 12 Gauge 17-4 PH Stai: Manufacturer: Rob Roberts Gun Works Color: Green Cerakote Fabric/Material: 17-4 PH Stainless Steel Gauge: 12 Choke Tube System: Benelli Crio Plus Rob Roberts Gun Works 200277 Turkey Choke Raptor Crio Plus 12 Gauge 17-4 PH Stai