Please consider adding the Master Arm - SAFE default starting position in attack vehicles as an additional weapons station like Saul did in his F/A-18X Black Wasp and as John_Spartan did in their Super Hornet aircraft. Realism in this area will allow users to select the Master Arm - Safe when landing, refueling, rearming, and other phases of combat where the weapons should be safe. This feature is easily scripted and could be applied to all vehicles with weapons in ArmA 3. I would recommend you consult Saul and John_Spartan on this as they have perfected it...thanks!
AV8R