Colt ar 15 models serial numbers#
Prior to 1969 some mil experimentals were made with no serial numbers, and there are duplicate serial numbers in this area as well. A lot of the GXs have serial numbers in the 14xxx range. There are also GXs that also have a serial number as well as the GX number. We believe that there are multiple GXs with the same number. GX’s are tool-room prototypes with a four digit number which is reportedly their master drawing. We have observed GX’s outside this range.