Though the Springfield M1A, a commercial copy of the popular military-issue M14, has 20-round magazines, there are range visits that just require a drum mag for a fun experience. AR-style rifle owners always had all the fun when it came to drum mags, but thanks to the team at Pro Mag, now owners of the Springfield M1A can get in on the fun. This Pro Mag Springfield M1A/M14 Drum Magazine is made using a proprietary type of Zytel-based polymer originally made by DuPont. The housing is made from this material, while the upper feed tower features a carbon-steel lip reinforcement that's overmolded to aid in durability and lubricity. The drum is completed with an injection-molded magazine follower that tops a spring made from heat-treated stainless steel. The Springfield M1A/M14 Polymer Drum Magazine from Pro Mag is designed for use with .308 Win./7.62 NATO cartridges only and features an all-black finish. The drum holds 50 rounds and is made in the USA.