Johnny Stewart Rob Roberts Gun Works 200135 T1 Triple Threat Invector 20 Ga 17-4 Ph S/S

The Johnny Stewart Rob Roberts Gun Works 200135 T1 Triple Threat Invector choke tube is a 20-gauge shotgun choke engineered for shooters who demand durability and precision in the field. Built from 17-4 PH stainless steel, this Invector-compatible choke delivers the kind of corrosion resistance and longevity that stands up to repeated use in wet conditions, coastal environments, or just plain hard hunting. If you're running an Invector-threaded 20-gauge barrel and want a choke that won't degrade over seasons of use, this is purpose-built for that job.

The stainless steel construction is no gimmick here—17-4 PH is a premium material choice that resists rust and pitting far better than standard steel chokes. That matters when you're storing gear in a truck bed, hunting near salt water, or simply want a choke that performs the same way year after year without maintenance headaches. The T1 Triple Threat designation suggests this choke is designed to handle multiple shot types or conditions, giving you flexibility in how you load and shoot.

Compatibility is straightforward: if your 20-gauge shotgun uses Invector choke threads, this tube will fit. Installation and removal follow standard choke procedures—hand-tight or with a choke wrench, depending on your preference. For 20-gauge hunters and sport shooters who've invested in an Invector-threaded barrel, a stainless steel choke like this one is practical insurance against corrosion and a solid backup to your primary tube.

Key Features

• Invector-compatible threading for seamless fit on compatible 20-gauge barrels
• 17-4 PH stainless steel construction resists corrosion and rust
• Durable material engineered for long-term field use and storage
• Standard choke tube installation—no special tools required

Specifications

Frequently Asked Questions

Will this choke fit my 20-gauge shotgun?

This choke is Invector-compatible, so it will fit any 20-gauge shotgun with Invector-threaded choke tubes. If you're unsure whether your barrel uses Invector threading, check your shotgun's manual or contact the manufacturer.

Why choose stainless steel for a choke tube?

17-4 PH stainless steel resists rust and corrosion far better than standard steel, especially important if you hunt in wet, humid, or coastal conditions. It's a long-term investment that won't degrade in storage and performs consistently season after season.

Can I use this choke for different types of shot?

The T1 Triple Threat designation indicates this choke is designed for versatility across shot types, though specific performance details should be confirmed with the manufacturer.