Add 5 (what I think is) industrial style turrets and mortars.Fire explosive shells or bullets.
Security Buildings: Rocket Artillery（Motar,20 bursts in one shot)
Auto Defense Turret
Towed Artillery Position
Auto Blaster Position
Field Gun Position（Motar)
Items: Uranium Alloy Shell (as ammo for new turrets)
I may add more stuff in the future.