ProMag SMI37 45 ACP 10rd Blued Steel Magazine for Smith & Wesson Shield

The ProMag SMI37 is a 10-round replacement .45 ACP magazine purpose-built for the Smith & Wesson M&P Shield .45 ACP pistol. Whether used as a spare for the range or a backup for everyday carry, it offers the same functional capacity as the original factory magazine in an affordable, durable package.

The magazine body is constructed from heat-treated steel and finished in a black oxide (blued) coating that holds up to regular concealed carry use. Inside, an injection-molded polymer follower rides smoothly against the tube, paired with an internal spring for reliable feeding. Disassembly for routine cleaning is straightforward via the included lock-plate and base-plate.

Engineered as a direct-fit replacement for the .45 ACP Shield, the SMI37 is a straightforward, made-to-fit solution for owners looking to expand their magazine rotation or replace a worn original.