LOL oh my goodnessthe 1903 isnt incorrect to shoot it just sometime u have to watch firing hot loads. i think serial..not positive num 0..... 300xxx they took the reciever under ultra violet light heated them up ( extreme tempeture ,hotter than u can load a round) and hit the reciever with a ball pin hammer.. under the ultra violet light on some of them,,, not all.....u could see a so fine less than hair thin crack