The Carlson’s Bismuth Bone Buster Invector Plus 20 Gauge Mid-Range Choke Tube (brand part number 09220) is CNC precision machined from 17-4 heat-treated stainless steel and tuned specifically to pattern Bismuth ammunition. A longer parallel section inside the choke, combined with extensive load testing, produces dense, consistent patterns with Bismuth shot, and the tube also runs lead and Hevi-Shot loads without issue. Built for a Browning Invector Plus-pattern barrel in the Mid-Range constriction, it’s a versatile everyday choice for a Bismuth-loaded waterfowl gun.

Key Specifications

• Sized for 20 gauge shotguns for a direct fit.
• Threads into the Invector Plus pattern used by Browning barrels.
• Ground to a Mid-Range constriction for versatile, all-around patterning.
• CNC machined from 17-4 heat-treated stainless steel.
• Tuned to produce dense, consistent patterns with Bismuth ammunition.
• Also rated for lead and Hevi-Shot loads.

Frequently Asked Questions

What ammunition is this choke built for? Bismuth, though it also runs lead and Hevi-Shot loads.

What constriction does it use? Mid-Range, a versatile all-around constriction.

Buy the Carlson’s Bismuth Bone Buster Invector Plus 20 Gauge Mid-Range Choke Tube

Get dense, devastating patterns with Bismuth loads. Order it from our Carlson’s lineup, part of our shotgun chokes selection, at our Lubbock, Texas gun shop for fast, direct shipping.