Checked the library of "Adrenaline Gamer 6.6" and those are the only functions that seem to be useful:
Code:
CTurret::SpinDownCall(void)
CTurret::SpinUpCall(void)
CBaseTurret::Ping(void)
CBaseTurret::EyeOn(void)
CBaseTurret::EyeOff(void)
CTurret::Shoot(Vector &, Vector &)
The last one might not have a compatible header defined in hamsandwich but maybe that can be worked out.