This is a factory .40 S&W/.357 Sig 14-round magazine for Sig P320/P250 pistols.
Sig Sauer’s P320 pistol (based on the P250 frame) is the Army’s new sidearm of choice, and the ultimate in striker-fired, modular handguns—thanks in no small part to its reliable factory magazine.
Built from durable carbon steel and high-end polymer, then finished with a special anti-friction coating, Sig Sauer factory magazines drop free and run all day long; preventing any malfunctions your gun might have with aftermarket magazines.
These magazines are designed for full-sized P320/P250 pistols chambered in .40 S&W and .357 Sig, but they’re also compatible with smaller models.