The PMAG 5 AC L, 5 rd magnum magazine for 300 Win Mag, 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 300/264 Win, 257/270 Weatherby, 7mm Remington, 300 H&H and others. Features self-lubricating follower; stainless steel spring; paint pen dot matrix panelson the bottom of the body to allow for identification markings and flared floorplate. Accepts a cartridge overall length of up to 3.50". Made in the USA. *Note- NOT compatible with .404 Jeffery based cartridges and its derivatives such as the Remington Ultra Magnums (RUM/RSAUM) and Winchester Short Magnums (WSM/WSSM).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.