Mod: Manual Turret [1.21+]

Spartan's Turrets mod will add a manual turret to Minecraft PE (Bedrock), as well as turret cannons will be added to the game. Just sit on the turret, stick the cannon in a specific slot and you will be able to attack from it.

Hand Turret mod feature

If you need new and modern ways to protect your constructions in Minecraft PE (Bedrock), then you can download this mod. The add-on has crafts, so, you can safely use it in your survival world.

How to shoot from the turret

Simply place the turret in Minecraft PE (Bedrock), sit on it, open your inventory and stick the gun in the appropriate slot.

Attack

And afterwards, with an item (looks like a scope) you can attack from the turret.