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. Comes with a lifetime warranty and includes an instruction manual. Currently available in black, optional colors coming soon. Please note: That with the wide variance in receiver specs there may need some slight fitting in order to work properly. Please read the owners manual before use.