Smith & Wesson M&P40 .40 S&W/.357 SIG 15-Rd Aluminum Magazine

The Smith & Wesson M&P40 / M&P357 Magazine is a factory OEM replacement pistol magazine purpose-built for Smith & Wesson's M&P-series duty pistols. The 15-round body is machined from black aluminum with a black finish and paired with a polymer base plate for reliable feeding and clean drops during speed reloads.

Engineered to feed both .40 S&W and .357 SIG cartridges, this single magazine gives M&P40 and M&P357 owners a versatile spare that covers either caliber without compromise. It drops directly into the full-size and compact M&P40 and M&P357 pistols, matching factory dimensions for immediate, hassle-free use.

Whether you're replacing a worn mag or building out your range kit, this genuine S&W magazine (part number 19439) delivers the quality and function expected from original factory equipment.