This is the ProMag Marlin 795 .22LR 70-round drum magazine. This drum mag may have an incredibly unique design, but don’t let that fool you; it shares the same durability and reliability you’ve come to expect from ProMag. With an impact-resistant polycarbonate construction, it’s ready for hard use. Inside, you’ll find an injection-molded polymer follower and a heat-treated chrome silicon wire spring that deliver exceptional reliability.