DETAILS: MDT Metal 300WM AICS magazines are manufactured from high strength steel and finished with Cerakote Elite for the ultimate in durability and corrosion resistance. Compatible with AICS pattern DBM chassis and bottom metals. This magazine has a 5 round capacity based on magnum rounds. IMPORTANT: The standard length long action magazine in an MDT Chassis is 3.715″. Remington Tactical Chassis Rifle and 338 Lapua XCR rifles use a 3.775″ magazine not available from MDT. Tikka T3/T3x and Savage Axis long action calibers in our chassis you must use the 3.560″ option. Will not work with 300 Remington Ultra Mag, 300 Weatherby, and similar cartridges. COMPATIBILITY: 300WM