The X Products X25 AR .308 High Capacity Drum Magazine has serious firepower in a small package! The X-25 is a .308 caliber 50 round single stack compact drum designed for AR .308 SR/25 rifles. The magazine easily loads and unloads by operating the front hand wheel. Designed to operate in automatic and semiautomatic applications, it employs a larger hand-wheel and double spring for increased reliability. Unique to this magazine's design is a patent pending feed device that allows the magazine to run massive spring pressures without effecting the firearm's bolt operation. The durable body is constructed entirely of aluminum; and finished in a friction reducing ceramic coating. All internal and operating assemblies are made of black oxide steel and aluminum and high impact, glass filled nylon. Magazine includes a lifetime manufacturer's warranty and instruction manual.