Spring RTS Engine

http://www.pointofexistence.com/siteres ... and/19.jpg

this is the M167. it is an anti air vulcan cannon used by the US as a quick deploy air defense system.

it might be a better replacemen than the flak-esque cannon in use now

I've considdered that, but it's gone the way of the dinosaur along with the M163 Vulcan.

http://www.globalsecurity.org/military/ ... d/m163.htm

It was replaced in favor for the Stinger missile system, M6 Linebacker and Avenger.

The GDF-003 is a Canadian 35mm gun much like the PRTL.

If you like I can make anti air artillery non-flak (blast fragmentation) and make them shoot straight at aircraft (mainly helicopters and low flying aircraft like in real life).