The Accuracy International AXMC/AXSR Magazine is a heavy-duty, factory-original 10-round multi-caliber magazine built for precision large-bore rifle systems. Constructed from high-strength steel coated in a corrosion-resistant matte black finish, it is engineered to handle the distinct cartridge geometry of both .338 Norma Magnum and .300 Norma Magnum rounds. This variant is designed with a durable, impact-resistant plastic base plate that minimizes weight and absorbs impacts from rapid changes or field drops. The internal geometry features a low-friction self-lubricating follower and a heavy-duty steel spring to guarantee smooth, binding-free cartridge stack advancement. It serves as a direct factory replacement or spare magazine, preserving the absolute feeding reliability required for long-range competition and tactical operations.