I was playing around with this in BFV this morning.
I tried it clientside with 4 pcos.
Vespa Horn (nitrous)
unlimited ammo
The vespa moved on its own and auto-fired 6 times.
Stationary_M60
unlimited ammo (i removed overheat)
The server crashed
MortarUS
20 ammo
The mortar auto-fired 7 times
Zippo
400 ammo (i removed overheat)
The zippo turret auto-fired 150 times
It was pretty neat. It seemed to empty about 3/8 of the clip for each click.
I wish there were a way to start it automatically though.
This guy got it working or so he said.
http://forumplanet.gamespy.com/bf1942_m ... /r5440950/Maybe it can't be done with a .active and it must be in the original creation. I'll test that tomorrow.