Carlson's Choke Tubes 09204 Bismuth Bone Buster Browning Invector-Plus 12 Gauge Mid-Range 17-4 Stainless Steel

The Carlson's Choke Tubes Bismuth Bone Buster in Browning Invector-Plus is built for waterfowlers and upland hunters who need a mid-range choke that performs with bismuth shot. Machined from 17-4 stainless steel, this choke tube resists corrosion from wet conditions and delivers the durability you'd expect from a shotgun accessory that has to work in weather. If you're running bismuth loads—whether for duck season or pursuing game on public land where lead is restricted—this mid-range constriction gives you the pattern density you need without the brittleness that can come from using harder alternatives in tight chokes.

Carlson's has engineered the Bismuth Bone Buster specifically around what bismuth demands. Because bismuth is slightly less dense than lead, it patterns differently, and a mid-range choke hits the sweet spot for most hunting distances. The 17-4 stainless construction means this tube won't degrade sitting in your gun bag between seasons or after a wet duck hunt—something that matters if you live in wet country or spend a lot of time on the water.

This choke is designed to fit Browning shotguns with Invector-Plus threading, so verify your gun's system before ordering. Drop it in, tighten it finger-tight, and you're ready to pattern your load before heading afield. It's the kind of straightforward upgrade that makes a real difference in consistent, clean kills.

Key Features

• 17-4 stainless steel construction for corrosion resistance and longevity
• Mid-range constriction optimized for bismuth shot performance
• Browning Invector-Plus threading compatibility
• Purpose-built for waterfowl and upland hunting with non-toxic ammunition

Specifications

Frequently Asked Questions

Will this choke tube fit my Browning shotgun?

This choke is threaded for Browning Invector-Plus systems. Check your shotgun's manual or the muzzle marking to confirm you have Invector-Plus (not standard Invector) before ordering.

Can I use this choke with bismuth ammunition?

Yes—this choke is specifically designed for bismuth shot. The mid-range constriction is engineered to work with bismuth's ballistic characteristics for optimal pattern density.

What makes 17-4 stainless steel better for choke tubes?

17-4 stainless resists rust and corrosion, which is important if you hunt in wet conditions or store the choke for extended periods. It's more durable than standard steel in harsh weather.

Is this a mid-range or tight choke?

This is a mid-range choke constriction. Mid-range chokes work well for typical hunting distances and pair well with bismuth loads, which pattern slightly differently than lead.