Springfield Armory's M1A is a pure classic. This former U.S. battle rifle, chambered in 7.62x51 NATO remains popular today and even has limited service in the U.S. military among designated marksmen units. The M1A utilizes a box style magazine, of metal construction, typically with a 20rd capacity, however there are options for 10, 15, or 25 round capacity as well. Check-Mate Industries (CMI) manufactures the preferred M1A magazine on the market today. Made of top quality materials, finished for corrosion resistance. CMI makes OEM magazines for Springfield Armory. These are outstanding magazines, we highly recommend these to M1A owners.