This rugged polymer magazine was engineered from the ground up based on belted magnums. The magazine features an anti-tilt follower” 14 round capacity and stainless steel spring. The magazine disassembles easily for cleaning. Weighs 7 ounces unloaded. Cartridges that can be used: .300 Winchester Magnum” 7mm Remington Magnum and .338 Winchester Magnum. Magazine can accommodate a cartridge up to 3.50″ overall cartridge length.