You can find the Smith & Wesson 9mm 15 Round Magazines for M&P Shield Plus/Equalizer here.

The Smith & Wesson M&P Shield Plus/Equalizer 9mm 15 round magazine is made from heat-treated steel construction with a high-visibility orange follower, high tensile Steel Spring. The magazine has a polymer finger rest floor plate that fits flush with the magazine well. This is the largest magazine made by Smith & Wesson for the Shield Plus or Equalizer.

Manufacturer: Smith & Wesson
Firearms: Smith & Wesson M&P Shield Plus and Smith & Wesson Equalizer
Caliber: 9mm
Capacity: 15 rounds