here is a direct copy and paste of the response from; and email sent to kel-tec. hopefully no harm comes from posting this.
The Grip was changed to say 308 WIN in order to pass regulations. The barrel however, remains un-changed from US model besides being not threaded.
Andrew
RFB Technician
Kel Tec CNC, INC.
321-631-0068
Just inquiring as to the chambering of Canadian specific RFB's, I realize the markings have been changed, but would like to know if the actual chamber profile was changed.
Can the rfb fire 7.62x51 NATO in Canadian spec?