I will before I die acquire a full auto. I have always loved the HK rifles and subs. It appears that I can purchase a full auto HK 91 or 93 (G3 etc) and use .223 or 9mm uppers? (assuming a .308 purchase) The recent post suggests broadening the scope of the weapon in this way and it makes sense. I would like 223 and 308 potential, any other straight forward transition weapons available? I am in Waco. Does anyone have experience with the local gendarm (cops) in terms of getting signed off for the transfer? Great pics in the forum. Like others I am jealous. MK