Sig-Sauer-P320-M18-M17-21-Round-Magazine

This extended single-stack magazine features a flared tan baseplate for improved grip and faster reload indexing while keeping a slim profile for compact pistols.
Steel-lined/polymer construction delivers durable, reliable feeding under repeated use—verify the listed caliber and exact pistol model before purchase.
Inspect feed lips, follower, and spring on arrival, keep it clean, and avoid long-term storage fully loaded to preserve spring life.
Function-test at the range to confirm reliable seating, feeding and lock-back, and always follow local capacity and safe-storage laws.