Description
Inertia-driven semi-autos have a reputation for running clean and cycling everything you feed them, and that operating system usually comes with a premium price tag attached. The Matrix Inertia is TriStar's first inertia gun, and this 20 gauge walnut version pairs that low-maintenance action with real Turkish walnut furniture and blued metalwork for a field gun that looks the part without emptying your wallet.
Why the Matrix Inertia 20 Gauge Makes Sense in the Field
The 26 inch vent rib barrel wears a 3 inch chamber, so you can run everything from light 2 3/4 inch target loads up to heavier 3 inch hunting shells. A bright fiber optic front sight sits up top for fast target pickup on flushing birds, and the crossbolt safety is right where your trigger finger expects it. Because the inertia system doesn't vent gases into the action the way a gas gun does, fouling stays out of the receiver and cleaning sessions get a whole lot shorter. Fewer moving parts to gum up means fewer excuses when a rooster gets up in front of you.
Handling and Fit of the TriStar Matrix
The 20 gauge Matrix is the lighter, quicker-swinging option in the lineup, and it carries nicely through a long day of walking hedgerows or chasing quail. The 14.25 inch length of pull fits most adult shooters comfortably, and the inertia action does a nice job of taking the sting out of stouter loads, which is a pleasant surprise in a gun this light.
What Comes With the Matrix Inertia Walnut
TriStar includes three Beretta Mobil pattern choke tubes, Improved Cylinder, Modified, and Full, so you're covered from close flushes over a dog to longer passing shots. The whole package is backed by TriStar's 5 year warranty, which is solid peace of mind at this end of the semi-auto market. For upland hunters, dove field regulars, or anyone who wants a wood-stocked autoloader that just runs, this one earns its spot in the safe.
Key Specifications
- Manufacturer: TriStar Arms
- Model: Matrix Inertia
- Manufacturer Part Number: 98751
- UPC: 713780987514
- Gauge: 20 Gauge
- Action: Inertia-Driven Semi-Auto
- Barrel Length: 26" Vent Rib
- Chamber: 3"
- Capacity: 4 + 1
- Stock: Turkish Walnut
- Finish: Blued
- Sights: Fiber Optic Front Sight
- Safety: Crossbolt
- Length of Pull: 14.25"
- Choke System: Beretta Mobil Pattern
- Warranty: TriStar 5-Year Warranty
What’s Included
- TriStar Matrix Inertia 20 gauge shotgun
- Three Beretta Mobil style choke tubes (Improved Cylinder, Modified, Full)
- Owner's manual
Frequently Asked Questions
What's the advantage of the inertia action on the TriStar Matrix?
Unlike a gas-operated semi-auto, the inertia system doesn't dump powder fouling into the action, so the gun stays cleaner and needs less lubrication and maintenance. It also handles a fairly broad range of ammunition and tends to soak up felt recoil well. It's the same style of operating system made famous by much pricier autoloaders.
What choke tubes does the Matrix Inertia 20 gauge come with?
It ships with three chokes: Improved Cylinder, Modified, and Full. They use the Beretta Mobil pattern, which is one of the most common thread styles out there, so aftermarket tubes are easy to find if you want to expand your options later.
Can I shoot both 2 3/4 inch and 3 inch shells in this shotgun?
Yes. The 3 inch chamber handles both 2 3/4 and 3 inch 20 gauge shells, so you can run light target loads at the clays range and step up to heavier hunting loads in the field. Like most inertia guns, it cycles most reliably with loads that have a little authority behind them, so very light promo loads may need a quick function check.
Does the TriStar Matrix have a magazine cut-off?
It does. There's a magazine cut-off button located in front of the trigger guard that lets you eject the shell from the chamber without feeding a new one from the magazine. That's handy for swapping loads on the fly or unloading the chamber while keeping the magazine topped off. The bolt also locks open after the last round is fired.



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