I just bought a M1A with alot of mags and five of them are 25 rounders. But the only markings on them is a five point star on the rear of the mag body. The finish is a black parkerize and all welds are correct. What do I have? The person I bought them from said they are manufactured by CMI but I don't think that is the case. Any info on these mags would help. Thanks in advance.