Since it was not the serial number I guess it did not matter? Is there a way to tell if this was an AMF or an H&R barrel job? Also, this does not appear to have a bushing? Does anyone have a link to an image of one? I thought only the MK2 MOD 0 rifles were available through the CMPicon. If so how did the MK2 MOD1 rifles show up for sale? I realize my rifle may just be a copy but I am curious about the history of the Navy rifles.