The Magpul Bolt Action Magazine Well 700L Magnum is a drop-in detachable box magazine solution for our Hunter 700L Stock. It was designed specifically for the Hunter 700L Stock and long action .300WM caliber AICS (Accuracy International Chassis Systems) pattern magazines, and its large trigger accepts most factory and aftermarket curved triggers. *NOTE: Due to potential variability of receiver dimensions, gunsmithing may be required for optimal fit and functionality. PMAG 5 AC L, Magnum NOT compatible with .404 Jeffery based cartridges and its derivatives such as the Remington Ultra Magnums (RUM/RSAUM) and Winchester Short Magnums (WSM/WSSM)