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

The Carlsons Bismuth Bone Buster is a 20 Gauge choke tube purpose-built to deliver tight, dense patterns with bismuth shotgun ammunition. Designed specifically for the unique ballistic properties of bismuth shot, the Bone Buster features a longer parallel section inside the choke than conventional factory chokes, helping squeeze every pellet into a uniform, lethal pattern at working ranges.

This choke is configured for the Winchester Invector thread pattern and is CNC precision-machined from 17-4 PH heat-treated stainless steel for outstanding corrosion resistance and a lifetime of reliable use in harsh waterfowl conditions. The Mid-Range constriction of .025" sits between open and full, making it a versatile choice for mid-distance ducks, geese and other waterfowl running non-toxic bismuth loads.

One choke tube is included. Whether you're patterning bismuth loads through a Winchester Invector-equipped shotgun or fine-tuning a modern waterfowl rig, the Bismuth Bone Buster is engineered to tighten patterns and put more pellets on target.