I have several "types" of Garand and M1A and M14 stocks, but number 3 in these photos fits none of those rifles. It has only 1 mark at the heel. No cut-out for selector switch, the bolt release relief cut is much narrower than on an M14 but about the same as an M1A stock. The barrel channel appears to be a different profile too. All other dimensions are nearly the same. The relief cut for the op rod is also not as open as an M1A stock. It will not allow an M1A barreled action to fit. #1 is from an early 5 line M1A (w/bedded action), #2 is a new old stock M14 stock, #3 is the mystery stock.