Rob Roberts Gun Works Biz Raptor Features The Rob Roberts Gun Works Biz Raptor choke tube is engineered specifically around bismuth shot performance a shot material widely used across the shotshell industry for its density and relative softness compared to steel. Pairing bismuth loads with the Biz Raptor choke gives shooters a tighter more consistent pattern than a generic choke would deliver with this shot type. Years of product development and innovation using advanced manufacturing technology went into refining the choke s internal geometry for this specific application. The Invector thread pattern allows the choke to install directly into compatible barrels without additional adapters. Machined from 17-4 PH U.S. stainless steel the Biz Raptor resists corrosion and wear even after repeated seasons of hunting in wet or humid conditions. This durability matters for hunters who depend on consistent performance trip after trip without needing to replace worn chokes. Shooters running over and under shotguns should note that the RRaptor design is only intended for use in a single barrel since its design does not allow for placement in both barrels simultaneously. The Rob Roberts Gun Works Biz Raptor is a specialized purpose-built choke for bismuth shooters who want the best possible pattern from their non-toxic loads available for sale at GrabAGun. Rob Roberts Gun Works Biz Raptor Specifications Manufacturer: Rob Roberts Gun Works Model: Biz Raptor Type: Choke Tube Caliber: 12 GA Material: 17-4 PH Stainless Steel Choke Configuration: Invector Available At: GrabAGun