Mod: Manual Turret [1.20; 1.21+]

Spartan's Turrets mod will add a hand turret to Minecraft PE (Bedrock), and turret cannons will also 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 buildings 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 a turret

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

Attack

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