Sig Sauer MAGMODF921COY P320/M17/M18 9mm Luger 21-Rd Extended Pistol Magazine - Black/Coyote Steel

The Sig Sauer MAGMODF921COY is a factory 21-round extended pistol magazine built for the Sig Sauer P320 family of 9mm Luger handguns. It is purpose-built for full-size and carry P320 pistols as well as the military-adopted M17 and M18 variants, and also drops into the Sig Sauer P250 and P320 X-Series pistols equipped with a factory magwell.

The body is constructed from durable steel with a corrosion-resistant black finish, paired with a contrasting coyote tan base pad that brings the total capacity to 21 rounds and provides a positive, easy-to-grip surface for fast reloads. Side witness holes allow quick visual round counts at a glance, and the factory design feeds reliably across the full stack. This is a brand-new Sig Sauer factory magazine, sold as a single magazine.

Whether you are running a duty P320-M17, a full-size carry P320, an X-Five, or a P250, this 21-round extended magazine delivers the extra capacity and the trusted factory performance that Sig Sauer is known for, finished in a distinctive coyote colorway that sets it apart from standard black magazines.