Johnny Stewart Rob Roberts Gun Works 200290 Biz Raptor Invector 20 Gauge 17-4 Ph S/S

The Johnny Stewart Rob Roberts Gun Works Biz Raptor Invector 20 gauge choke tube delivers precision shot placement and durability for 20 gauge shotgun users. Built from 17-4 PH stainless steel, this choke tube is engineered to withstand the pressures and corrosion that come with field use, whether you're hunting upland game, working clay targets, or running patterns at the range. The Invector design provides consistent performance and reliable function cycle after cycle.

Stainless steel construction means you get a choke that resists rust and oxidation—critical when your shotgun sees wet conditions or gets stored for weeks between outings. The 17-4 PH material is tough enough to handle repeated installation and removal without stripping or binding, so you can swap loads and shot sizes without babying your tube.

If you run an Invector-equipped 20 gauge and need a backup choke, a tighter or more open pattern option, or simply a reliable spare, the Biz Raptor delivers the build quality and corrosion resistance that justify keeping it in your gun bag or at the range.

Key Features

• 17-4 PH stainless steel construction resists rust and corrosion
• Invector-compatible design ensures proper fit and function
• Built for 20 gauge shotguns
• Durable material withstands repeated installation and field use

Specifications

Frequently Asked Questions

Is this choke tube compatible with my 20 gauge Invector shotgun?

Yes, the Biz Raptor is designed for Invector-equipped 20 gauge shotguns. Verify your shotgun uses the Invector system before purchase.

Why choose stainless steel for a choke tube?

Stainless steel resists rust and corrosion better than blued steel, making it ideal if your gun sees moisture, salt air, or extended storage between uses. It also handles repeated removal and installation without degrading as quickly.

Can I use this choke tube with different shot sizes?

Choke tubes are selected based on your desired shot pattern and velocity. You can swap chokes to match different loads, but the tube itself is a fixed constriction and doesn't adjust.