Maddie's Grenade Pistol from Arcane

Replica of Maddie Nolen's grenade pistol from Arcane season 2. This is the weapon she has in the strike team assembling scene. The prop is designed so it is possible to slide the barrel open and closed, open chamber cover and press the trigger.

Two elastic bands are used for the design and most the prop can be disassembled, allowing replacement of the bands in the future.

Additional Components

The prop is designed to use 2 elastic bands with a string diameter of up to 2mm and a circumference of the entire loop of about 13cm. In both locations, these bands are folded double, so shorter bands with half the circumference will also work well. I used standard thin hair bands from a local clothing store.

Assembly

The first band is used to hold the Forward Stop inside the Back Barrel. First insert the Forward Stop into the slot in the Back Barrel, it is only possible to insert it from one side. Then wrap the elastic band under one of the hooks, over the Forward Stop and under the other hook. Twist the band and wrap it back under both hooks again.

The second band is used to tension the trigger. Insert the Trigger Pin into the Trigger, wrap the band around the groove in the Trigger and insert this assembly into the Stock Front. Make sure that the Trigger Pin fits into the half-cylinder groove in the Stock Front. Make sure to pull the elastic band forward and don't lose your grip on it. Also insert the hinge cylinder of the Cover into it's half-cylinder groove in the Stock Front. Now insert the Stock into it's slits. Push in the Stock Spike half way in and wrap both the elastic band loops over it, then push the Stock Spike all the way through to lock the everything in.

Now you can glue in the Back Barrel and both Cog Covers onto the Front Stock. Glue the Rail and Front Barrel Decoration into respective slot on the Front Barrel. 

Finally insert the rail into it's slot on the Front Stock, followed by the Rail Lock and lastly the Rail Lock Spike.

Extra

The .3mf file has support enforcers for all necessary parts, made for my Prusa MK4S in PrusaSlicer. Make sure it looks okay before printing, or use it as suggestion of print layout.

My print was done with AddNorth's black “X-PLA” and then painted using acrylic paints, a sponge and a brush.

The model is created in OnShape and can be copied and modified from this link. However, it is created in a single parts studio, so may not be super intuitive to work with, for which I take no responsibility :p