Well
Well I wasn't trying to start an argument, so no need to be defensive. I have been in the Army for 17 years now and work on helicopters. I worked on the Comanche project for 2 years, as well as taught at the schoolhouse. Believe me the Comanche program is very much dead. As far as the caliber of the weapon, wknight40 is absolutely correct, it is a 30mm chain gun.
And thanks for the welcome tommie.