The results were positive .
As of October 1969 all USAF OV - 10As were to be armed with their internal . 308 in ( 7.62 mm ) M60C machine guns , which had generally been left out during the Combat Bronco evaluations and subsequent deployment .
The results were positive and as of October 1969 all USAF OV - 10As were to be armed with their internal . 308 in ( 7.62 mm ) M60C machine guns , which had generally been left out during the Combat Bronco evaluations and subsequent deployment .