This is a very rare USGI M1 Carbine magazine. It features steel "Split-Back" construction with last round bolt hold-open follower, Type V floorplate and is marked "J" on the spine indicating Jahn Manufacturing. These magazines made by Jahn Manufacturing were only made from 1966 to 1967 before the company was purchased by OKAY Industries making them very scarce. Overall condition is good USGI military surplus with wear and light patina from use. This would be a great magazine for anyone who collects M1 Carbine or Vietnam War items. Buy online today!