Check-Mate Industries Check-Mate M1A / M14 Compatible Rifle Magazine .308 Win 20/rd. The proven reliability of our gun magazines speaks for itself. Included Accessories: Y Package Contents: Check-Mate Industries M1A/M14 Magazine What firearm models does the manufacturer say Check-Mate Industries M1A/M14 Magazine is compatible with? The manufacturer suggests that Check-Mate Industries M1A/M14 Magazine is compatible with Springfield Armory M1A M14Check-Mate Industries Check-Mate M1A / M14 Compatible Rifle Magazine .308 Win 20/rd M1A-20