ProMag Ruger P91 .40 SW 50 Round Drum Black Polymer Magazine

The ProMag Ruger P91 .40 SW 50 Round Drum Black Polymer Magazine is a 50 round drum magazine that fits the Ruger P91 .40 Smith and Wesson. It features an injection molded magazine follower and the magazine spring is formed from heat treated chrome silicon wire. ProMag's magazines are proudly made in the USA.