This is the ProMag AR-15 6.8 SPC 50-round drum magazine. 

Nobody wants to waste time reloading when at the range or out in the field. This 50-round drum magazine from ProMag will help you avoid that as much as possible.

ProMag constructed these magazines with durability and reliability in mind, using a proprietary DuPont Zytel-based polymer. Inside each drum is a heat-treated stainless steel magazine spring and an injection-molded polymer follower, keeping them running smoothly through all 50 rounds.

Whether you want to maximize your SHTF protection or save time at the range, these 50-round magazines will have you covered. Did we mention they are also made in the USA?!

Don’t forget to add one or two of these drum mags to your cart before continuing your shopping!