Yeah, the Korean War was a wakeup call for the USAF with regard to firepower. As for the MiG-15's guns, the 37mm was an anti-bomber gun, but I've always wondered why the twin 23mm is considered to have a low rate of fire by so many? Each 23mm had a rof of 800-850 rpm. That's 1600-1700 23mm shells per minute. I would think the 80-rounds per gun (6 seconds worth) was a greater limitation than rof.