Carlsons Bismuth Bone Buster 20 Gauge Extended Range Winchester Invector 17-4 Stainless Choke Tube

The Carlsons Bismuth Bone Buster choke tube is purpose-built to deliver dense, consistent patterns with bismuth shotgun ammunition, making it an excellent choice for waterfowl hunters running non-toxic bismuth loads in place of steel or lead shot.

This 20 Gauge choke is configured for the Winchester Invector choke system, and is profiled as an Extended Range constriction at .040". The tube is CNC precision machined from 17-4 stainless steel, a corrosion-resistant grade well suited to the wet, marshy conditions of waterfowl hunting.

Sold as a single choke tube. Whether patterning bismuth loads for early-season ducks or late-season geese, the Bismuth Bone Buster gives hunters a dedicated choke for extracting maximum pattern performance from bismuth shot.