Warne MESW54BLK Magazine Extension for S&W M&P 9mm Luger/.40 S&W +5/+4 Rd Black

The Warne MESW54BLK Magazine Extension is a precision-fit aftermarket base pad engineered for Smith & Wesson M&P pistol magazines. Machined from 6061-T6 aluminum and finished in a hardcoat anodized black coating, this extension is built to deliver long service life while adding meaningful capacity to your existing M&P magazines.

Designed to fit both 9mm Luger and .40 S&W M&P magazines, the MESW54BLK adds +5 rounds to 9mm Luger magazines and +4 rounds to .40 S&W magazines, giving competitive shooters, duty users, and everyday carriers extra firepower without swapping magazines mid-stage or mid-magazine change. The hardcoat anodized finish resists wear, scratches, and corrosion under hard range use and everyday carry conditions.

Warne shaped the extension with an ergonomic profile that aids positive magazine insertion under stress, and added finger grooves along the base that double as a stripping point so a stuck magazine can be quickly removed from the pistol by hand. The lightweight 6061-T6 aluminum construction keeps added weight to a minimum so the magazine still indexes and feeds reliably in your M&P.

Whether you run an M&P9 or an M&P40, the Warne MESW54BLK offers a simple, no-gunsmithing way to extend your magazine's capacity and improve handling. Installation is straightforward - simply remove the factory base pad and install the Warne extension to upgrade your existing M&P magazines.