The Sig Sauer P320 23-round Extended Magazine is a premium factory-grade component designed to provide maximum firepower and mission-critical reliability for the P320 Full-Size, Carry, and M17/M18 platforms. Constructed from rugged carbon steel with a corrosion-resistant finish, this extended magazine features a high-visibility follower and a heavy-duty spring to ensure consistent, jam-free feeding during high-volume strings of fire. The integrated witness holes along the rear of the body allow for an instant round-count assessment, while the impact-resistant polymer base pad provides a secure grip for rapid reloads and extra protection against drops. Engineered to the exact tolerances of the Sig Sauer P320 series, this 23-round magazine is the ideal choice for competitive shooters, tactical professionals, and home defense enthusiasts who require a high-capacity advantage without compromising the functional integrity of their 9mm firearm. Sig Sauer P211/P320 Full/Carry 9mm 23rd Extended Magazine w/ Witness Holes for P320 Models 8901964