The AR-15 65 Round Drum from ProMag fits AR-15 .223/5.56mm rifles. 

The drum housing is constructed of a proprietary DuPont Zytel based polymer. The magazine upper tower has full length steel internal insert stamped and welded like the factory magazine. It has over molded stamped steel feed lips and magazine catch. The follower is injection molded. It has a patented design and heat-treated chrome silicon wire magazine spring.

Caliber: .223/5.56mm

Capacity: 65 rounds

Finish: Black

Material: DuPont Zytel based polymer

Fits: AR-15 .223/5.56 rifles

ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer's defects. Each step of the assembly process is checked and double checked to maintain the same consistent level of quality.