Description
Turkey hunting comes down to one shot, and the Johnny Stewart Rob Roberts Gun Works Final Strut Turkey Choke is built to make that shot count. This is the Invector-pattern version for 20 gauge shotguns, machined to a .570 constriction that squeezes your pattern down tight so more pellets land in the kill zone at longer distances. Rob Roberts has spent years developing these tubes, and the Final Strut line is their dedicated turkey design meant to deliver consistent results well past 50 yards when you pair it with a quality turkey load.
What Sets the Final Strut Turkey Choke Apart
These chokes are machined from 17-4 PH stainless steel and heat treated, which is what lets them handle lead, steel, and other non-toxic shot without babying them. That matters for a turkey tube since a lot of hunters are running heavy TSS and modern hard-hitting payloads. The stainless build also holds up to weather and the wear that comes with real hunting seasons, not just range days. Each tube is laser engraved so you can tell at a glance which one you've got screwed in.
Getting the Most From Your 20 Gauge Final Strut Choke
A tight turkey choke only shines when you pattern it. Take it to the range, try a couple different turkey loads, and shoot at turkey-head targets at the ranges you actually expect to hunt. The .570 constriction is on the tighter end for 20 gauge, so finding the load your gun likes best is what turns a good pattern into a great one. Once you've got that dialed, you'll know exactly where your gun hits and how far you can reliably reach.
This tube fits shotguns cut for the standard Invector thread pattern, so double check that your barrel matches before ordering. For 20 gauge turkey hunters who want a purpose-built choke without a lot of fuss, the Final Strut is a straightforward, dependable pick.
Key Specifications
- Manufacturer: Johnny Stewart / Rob Roberts Gun Works
- Model: Final Strut Turkey Choke
- Manufacturer Part Number: 200172
- UPC: 810174900811
- Gauge: 20 Gauge
- Thread Pattern: Invector
- Constriction: .570
- Material: 17-4 PH Stainless Steel, Heat Treated
- Shot Compatibility: Lead, Steel, and Non-Toxic Loads
- Intended Use: Turkey Hunting / Tight Patterns
- Marking: Laser Engraved
What’s Included
- Johnny Stewart Rob Roberts Gun Works Final Strut Turkey Choke (Invector, 20 Gauge)
Frequently Asked Questions
Will the Final Strut Turkey Choke fit my 20 gauge shotgun?
This tube is cut for the standard Invector thread pattern used on many Browning and Winchester 20 gauge shotguns. It will not fit Invector Plus, Rem Choke, or other thread patterns, so confirm your barrel is marked for standard Invector before ordering. If you're not sure, check your barrel stamp or the original choke that came with the gun.
What constriction is this Final Strut choke and how tight is that for a 20 gauge?
It's a .570 constriction, which is a tight, turkey-focused squeeze for a 20 gauge. That extra constriction is what pulls your pattern together so you get a dense core of pellets at longer ranges. It's built for putting shot on a gobbler's head and neck rather than open-choke close work.
Can I shoot TSS and non-toxic loads through the Final Strut Turkey Choke?
Yes. The choke is made from heat-treated 17-4 PH stainless steel, which handles lead, steel, and other non-toxic loads. That makes it a good match for modern heavy turkey payloads, including TSS, which many 20 gauge hunters rely on for reach.
Do I need to pattern this choke before turkey season?
Absolutely, and it's worth the range time. A tight turkey choke like this can pattern very differently from one load to the next, so try a few turkey loads and shoot at turkey-head targets. Once you find the combo your gun likes, you'll know your effective range and exactly where your gun prints.




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