Working Item Dupe for Minecraft Bedrock 1.21

We have a new duplication bug in Minecraft: Bedrock 1.21.124 to get a bunch of different things, and it’s pretty broken since it’s not the type where you have to leave the world we all know. Instead, we’re gonna make a small mechanism to get a lot of materials, and it works up to the latest 1.21 update and is compatible on all platforms. It is not yet known whether it works on servers, so if you try it, leave a comment to find out this information.

Duplication bug step by step

Preparing the area and materials

First, you need to find a completely flat area located strictly within one chunk. If the mechanism crosses the chunk border, it may not work. To see the chunk boundaries, a special texture is used, where the rocket in the second hand shows the boundaries.

Building the base of the mechanism

Place two chests next to each other and a third chest on top. Place a temporary block behind the chests, followed by a funnel. After removing the temporary block, add another funnel pointing towards the first one. The last funnel is placed in the bottom chest, pointing towards the chest. All connections must be precise, otherwise the mechanism will not work.

Preparing items

Four non-stackable items are placed in the first single chest, for example, wooden swords or any other items that dont fit into one slot.

Installing observers

An observer is placed on the temporary block, pointing upwards. After removing the block, a second observer is placed underneath it. The arrows on them should point in opposite directions. A flashing dot at the top indicates that part of the mechanism is working.

Pistons, obsidian, and slime blocks

A piston is placed on top of the observers, which will constantly turn on and off. An obsidian block and a piston pointing in it’s direction are placed nearby, with a lever to turn it off. Then slime blocks are installed in the desired positions. When the lever is activated, the entire structure begins to move.

Blocking the funnels and finishing elements

A redstone torch is placed near the funnels to block them. A comparator in activated mode is placed in the same place. A little further away is a second comparator, but this one is not activated. To complete the circuit, another block and redstone dust are added. The mechanism is now completely ready.

Preparing a bag with items

Only items placed in the bag can be dupled. The maximum volume is 64 units, which can be one type of item or several, if they completely fill the bag.

Backup copy of the world

Before starting, it is recommended to create a copy of the world, as there is a small chance that items may dissapear. To avoid losses, the world is duplicated in advance.

Starting the duplication process

The bag with items is lowered into the funnel. After that, the lever is quickly activated. An important point is that you need to open the funnel as quickly as possible, many times in a row. Everything should look as if the funnel is constantly flashing.

To see if the process is working, you can look at the upper funnel – the bag continues to appear there. Check the bottom chest from time to time: duplicate bags will start to appear in it. Sometimes items end up in other funnels.

Repeating and obtaining large quantities

To get more items, just put another bag in and repeat the quick openings. The method works very fast and allows you to get the required amount without restrictions.

Duplicating items in 1.21.124

The method is considered very effective and is used by many. You can continue to duplicate bags until you get the desired amount of resources.

Video guide