Checkmate Sig P226 18-Round Magazine
The Check-Mate SIG P226 18-Round Magazine is an aftermarket flush-fit 9mm magazine built for the full-size SIG Sauer P226 service pistol. It pairs a heat-treated steel body with a high-tensile spring, anti-tilt polymer follower, and removable floor plate for dependable feeding and easy maintenance. Manufactured in the United States by Check-Mate Industries — an ISO 9001-certified OEM supplier to military and law enforcement contracts — this magazine delivers factory-grade fit and function at a working-shooter price. A solid pick for range training, competition, and duty-style practice with the P226 in 9x19mm.
In stock
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- SKU
- CM922618
$27.61
Description
Features
- 18-Round 9mm Capacity — Holds 18 rounds of 9x19mm in a flush-fit body, giving you two extra rounds over standard 15-round P226 magazines without an extended baseplate.
- Flush-Fit Design — Sits clean against the magwell for unobstructed grip, comfortable carry, and snag-free reloads from a belt or pouch.
- Heat-Treated Steel Body — Carbon steel tube is heat-treated and finished for corrosion resistance and long service life under heavy range use.
- High-Tensile Steel Spring — Heavy-duty spring maintains consistent feed pressure from the first round to the last, even after extended loaded storage.
- Polymer Follower — Anti-tilt polymer follower keeps rounds properly aligned and reliably engages the slide stop on the last shot.
- Removable Floor Plate — Detachable baseplate allows quick disassembly for cleaning, inspection, and spring replacement.
- SIG P226 Compatibility — Drops into full-size SIG Sauer P226 9mm pistols, including legacy, E2, and current production variants.
- ISO 9001 Manufacturing — Built by Check-Mate Industries, a US-based ISO 9001-certified OEM supplier with decades of military and law enforcement magazine experience.
- Precision Feed Lips — Tightly controlled feed lip geometry delivers a wobble-free fit in the magwell and consistent presentation to the chamber.
More Information
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Customer Reviews
Top customer reviews
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RELIABLEIf you're a casual shooter who wants a reliable spare mag without the factory price tag, this will do the job
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Runs great in my P226Picked up two of these to add to my range bag rotation and they have been flawless so far. Ran about 200 rounds of 115gr FMJ through one over the weekend and had zero hiccups, no failures to feed. The spring is stiff loading the last two rounds so I ended up grabbing my UpLULA loader which made it way easier. Fits flush enough on my P226 that it doesnt look weird either. For the price these Check-Mates are hard to beat.
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Solid mag for my P226Been running these through about 400 rounds now at the range and zero issues. Feeds smooth, locks up tight, and the extra 2 rounds over stock is a nice bonus. Way better then I expected for the price honestly.
Great value for the price
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This Is How It Should’ve Come From SIGBought a handful of these for my P226 because factory mags are pushing $45+ and I wanted more capacity. They’ve been 100% no failures, solid lockback every time. The fact that it holds 18 and still sits flush is honestly the best part. Feels just like an OEM mag in hand.
18-round flush-fit capacity with no added bulk
Great value $27 vs OEM pricingN/A
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