I don't think it's a matter of copy catting, but more of a logisitc's thing. Like N.K. troops armed with M16's, so they're first waves can pick up we leave.
They need parts, pull them off one of our HUMVEE's. Not to sound like a conspericy theorist but they seem to be preparing for ground combat with us. Most of their vehicle's are of Americna or Western design, their tanks are basically pieced together from M48's and M60's.