The ProMag® MKA 1919 12 Gauge 15-Round Drum Magazine is a hybrid-designed, high-capacity drum magazine, featuring a carbon steel feed tower and an injection-molded polymer body, designed to deliver exceptional durability in virtually any environment. The heat-treated chrome silicon wire internal spring and injection-molded polymer follower offer flawless operation for reliable feeding performance, while the steel feed lips deliver a precise fit for added reliability. Made in USA.