Description
There is a lot to like about a 20 gauge pump that carries easy, points fast, and does not fuss over what you feed it. The TriStar Cobra III Field checks all three boxes. The 3-inch chamber runs everything from soft-recoiling target loads to stout waterfowl shells, and the action cycles noticeably smoother than you would expect at this level. TriStar improved the Cobra III over the earlier Cobra line specifically in how effortlessly it racks, and it shows when you need a quick second shot on a flushing bird.
Built for Real Days Afield
The 26-inch barrel is a sweet spot for a 20 gauge field gun, long enough to swing smoothly on crossers but not so long that it hangs up in thick cover. It wears a vent rib with a matted sight plane and a fiber optic front sight that grabs your eye in low light, which matters more than people think on gray mornings and late-evening dove fields. The barrel and chamber are chrome lined for easier cleanup and long-term durability, and the extended forend gives your lead hand plenty of real estate for positive control. At roughly 6.7 pounds, this is a shotgun you can tote all day without your shoulder filing a complaint.
Cobra III Choke Flexibility
The removable choke system uses Beretta/Benelli Mobil threads, one of the most common patterns out there, so aftermarket tubes are everywhere. TriStar includes Improved Cylinder, Modified, and Full tubes along with a choke box and wrench, covering you from close-in quail work to longer pass shooting without buying a thing.
Why the Cobra III Field Earns Its Keep
The bottom-loading tubular magazine holds 5+1 and ships with a removable shot plug for migratory bird hunts. A rubber recoil pad takes the sting off heavier loads, swivel studs are already installed for a sling, and the thumb-reach safety blocks the trigger, hammer lever, and hammer when engaged. TriStar backs it with a five-year warranty, which says plenty about how much confidence they have in this platform. For a first shotgun, a truck gun, or a dedicated upland companion, this one earns its spot in the safe.
Key Specifications
- Manufacturer: TriStar Arms
- Model: Cobra III Field
- Manufacturer Part Number: 23133
- UPC: 713780231334
- Action: Pump Action
- Gauge: 20 Gauge
- Chamber: 3 inch (accepts 2-3/4" and 3" shells)
- Barrel Length: 26 inches, vent rib, chrome lined
- Capacity: 5+1 (removable shot plug included)
- Choke System: Beretta/Benelli Mobil thread
- Chokes Included: Improved Cylinder, Modified, Full
- Front Sight: Fiber Optic
- Safety: Thumb safety behind trigger guard
- Weight: Approx. 6.7 lbs
- Warranty: 5-Year Manufacturer Warranty
What’s Included
- TriStar Cobra III Field 20 Gauge Pump Shotgun
- 3 Choke Tubes (Improved Cylinder, Modified, Full)
- Choke Tube Box
- Choke Wrench
- Removable Magazine Shot Plug (installed)
- Owner's Manual
Frequently Asked Questions
Can the TriStar Cobra III 20 gauge shoot both 2-3/4 inch and 3 inch shells?
Yes. The 3-inch chamber handles both 2-3/4 inch and 3 inch shells, so you can run light target loads at the clays range and step up to heavier field or waterfowl loads on the same gun. Since it is a pump action, it will cycle low-brass practice loads without any of the reliability concerns some semi-autos have with light ammo.
What choke tubes fit the Cobra III Field?
The Cobra III uses the Beretta/Benelli Mobil thread pattern, which is one of the most widely supported choke systems on the market. It ships with Improved Cylinder, Modified, and Full tubes plus a choke box and wrench. If you want something more specialized like a turkey choke, aftermarket Mobil-thread tubes are easy to find.
How much does the Cobra III 20 gauge weigh, and is it good for smaller framed hunters?
This 26-inch model comes in around 6.7 pounds, which is light enough to carry comfortably on long walks through upland cover. The 20 gauge chambering combined with the rubber recoil pad keeps felt recoil manageable, making it a popular pick for younger hunters and anyone who finds a 12 gauge more punishment than fun.
Does the TriStar Cobra III come with a plug for waterfowl hunting?
Yes, the 5-round tubular magazine ships with a removable shot plug already installed, limiting capacity for migratory bird hunts. TriStar designed it for quick removal, so switching between full capacity and plugged configurations takes just a few minutes. Swivel studs are also factory installed if you want to add a sling for the marsh.





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