The PMAG 5 AC L, Magnum is a reliable and durable polymer magazine for .300 Winchester Magnum-based family of cartridges and is compatible with long action AICS-spec bottom metal, to include the Bolt Action Magazine Well 700L for the Hunter 700L Stock. Featuring GEN M3 technology, a paint-pen dot matrix for visual identification, and a flared base plate for positive control and ease of retrieval, the PMAG 5 AC, L Magnum - AICS sets a new standard for bolt action magazines. Product Specifications Manufacturer: Magpul Model: Compatible with long action AICS (Accuracy International Chassis Systems) pattern bottom metal and Magnum cartridges built on a 0.530" belted case head such as .300 Winchester, .257 Weatherby, .264 Winchester, .270 Weatherby, 7mm Remington Caliber: .300 Winchester Magnum Magazine Capacity: 5 Rounds Additional Features: Polymer