Check-Mate® Sig Sauer® P226 Flush-Fit 9mm Magazine – 18 Rounds – CM9-226-18
The Check-Mate® Sig Sauer® P226 18-Round 9mm Handgun Magazine (CM9-226-18) is a premium, 2026 duty-grade feeding device engineered by Check-Mate Industries—an ISO 9001-certified American manufacturer renowned for producing high-reliability military and law enforcement contract magazines. While standard legacy factory sticks restrict the full-size P226 platform to a 15-round baseline, Check-Mate’s advanced engineering team optimized internal spacing geometries (850020492060). This design unlocks a heavier 18-round payload in a true flush-fit profile, maximizing on-board ammunition without letting an extended baseplate stick out past the magwell frame to print against apparel.
Precision-stamped from premium, through-hardened high-carbon steel, the magazine tube is polished internally and externally to reduce structural drag during rapid reloading transitions. The exterior shell is treated with a heavy-duty, corrosion-resistant black coating that rejects environmental humidity, skin oil, and harsh range chemical solvents. Internally, the CM9-226-18 layout uses a specialized, proprietary +10% high-performance power spring to maintain uniform upward driving force, preventing nose-diving failures even when subjected to intense rapid-fire cycles. This heavy-duty spring drives a self-lubricating, low-drag polymer anti-tilt follower that feeds standard training rounds or aggressive jacketed hollow points (JHPs) flawlessly while ensuring crisp, authoritative engagement of the weapon's slide stop on the empty chamber click. Finished with a impact-resistant, removable flat polymer floorplate, this magazine is a rugged, working-man solution for home defense, open carry, or high-volume target training.
Includes: (1) Check-Mate Sig P226 Compatible 18-Round 9mm Flush-Fit Steel Magazine – Black.
*Compliance Note: This is an extended high-capacity 18-round magazine. Due to local legal restrictions, this item CANNOT be shipped to California, Colorado, Connecticut, Delaware, Washington D.C., Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Vermont, or Washington.
Key Features
- 18-Round Flush-Fit Geometry: Delivers an extra 3 rounds over standard legacy 15-round P226 magazines without adding length or bulk past the bottom of the grip.
- ISO 9001 Military Contractor Quality: Stamped and assembled in the USA by Check-Mate Industries, matching the build specs of elite duty-issue hardware.
- Upgraded +10% Power Springs: Heavy-duty internal coil resists fatigue and spring compression set, ensuring crisp upward drive even when stored fully loaded for long periods.
- Self-Lubricating Anti-Tilt Follower: Specialized polymer follower keeps cartridges perfectly indexed and consistently aligns rounds to prevent failure-to-feed (FTF) jams.
- Through-Hardened Steel Shell: High-tensile carbon steel tube is heat-treated to resist crushing or feed lip deformation from accidental drops onto concrete.
- Removable Base Plate Protection: Low-profile flat polymer floorplate absorbs drop shock during tactical reloads and slides off easily for bench maintenance.
Product Specifications
- Brand: Check-Mate® (Check-Mate Industries)
- Model Fitment: Sig Sauer® P226, MK25, P226 Legion, and Tisas PX-9 Gen 3 Series
- SKU / MPN: CM9-226-18 (CM922618)
- Caliber: 9mm Luger (9x19mm)
- Capacity: 18 Rounds
- Body Material: Through-Hardened High-Carbon Steel
- Finish: Corrosion-Resistant Matte Black
- Spring Matrix: High-Performance +10% Power Spring Wire
- Follower Profile: Low-Friction Self-Lubricating Anti-Tilt Polymer
- Baseplate: Removable Flat High-Impact Polymer
- Country of Origin: Proudly Made in the USA
- Weight: 3.20 oz (0.20 lbs)
- UPC: 850020492060
