This is a factory 21-round magazine for Sig P320/P250 pistols.
Sig Sauer’s P320 pistol (based on the P250 frame) is the new sidearm of choice for American fighting men, and the ultimate in striker-fired, modular handguns—thanks in no small part to its reliable factory magazine.
These magazines give your 9mm P320/P250 the ultimate in firepower; with a full 21 rounds tucked into a magazine that extends just over an inch below your magazine well. Built to Sig’s exacting quality standards from carbon steel and high quality polymer, these magazines are ideal for home defense, trips to the range, or any use where a few extra rounds could make all the difference.
Polymer baseplate fits flush with full-size P250/P320 pistols, but the magazine will also function with smaller models.