What a cute little twin prOOOHMYGAWD its got a gun!
This little aircraft is equipped with a 30mm Chain gun retracted in the fuselage.

To operate the gun mid-flight, activate air to ground mode and get into a stable flying position where you can circle around the target (full flaps with 34% throttle and some degrees of bank angle works fine), then decativate the flight controls (AG8), lower the turret (AG1, VTOL slider up), switch to Camera 3 (F7) and activate the Turret controls (AG2). Now you can start blasting.

The turret can be moved with your pitch and roll inputs. If you want to make corrections to your turning radius while being in the "gun mode", you can use Trim to change your roll/yaw rate. You can also still adjust your throttle.

The low speed characteristics of this plane are pretty bad and i would never go below 100 knots with this thing. But the gunship part is really fun. Enjoy :D