***OUTDATED VERSION***
Find the new model here: https://www.printables.com/model/1281741-mag-fed-rbg_3-burst-edition

I have spent a few years iterating this project. Finally it is reliable and fairly simple. This rubber band gun shoots bands from a MAGAZINE. It uses small “rainbow loom” bands, which allows the design to be compact. Unlike other repeaters or gatling guns, this mag fed gun stores its ammo unstretched. This allows multiple mags to be loaded for long periods of time without the worry of bands breaking due to fatiguing rubber. While other designs change trigger pull weight or cocking force with each shot, this one stretches just one band at a time giving a consistent racking experience. There is a hollow grip for convenient band storage and an access port in the slide for monitoring, and clearing jams.
A full demo and assembly video can be found here:
https://www.youtube.com/watch?v=B9_oLZ1OBtQ
Skill level:
Intermediate. This project requires intermediate knowledge of your slicer, E.g. support blocking and seam placement. The cleanup and assembly is straightforward.
Tools:
X Acto and/or utility knife
Sandpaper and/or file
Pliers or flush cutters for support removal
Screwdrivers and or Allen keys for hardware
Materials:
PLA or other stiff filament
Two M3 x 20mm machine screw
One M3 x 14mm machine screw
Two pen springs, just under 5mm OD.
Two 5x5x2.5mm Magnets
60mm of 1.75mm Filament for sliding pins
Super Glue
15mm wide or narrower thin double sided tape(or just glue)
Rubber Bands!
Dimensions:
Gun. 180mm x 124mm x 32mm.
Mag.122mm x 35mm x 7mm.
P.S. I have no idea if the picatinny rail is functional. It it based on dimensions from online and I have never tried it. Please tell me if it works!


Mag Fed Mini Rubber Band Gun

Grip.stl

Do you have a box of rainbow loom bands buried somewhere, collecting dust? Here is the perfect project to give them a new life!
Introducing Burst edition, the 3rd generation Mag Fed RBG. Achieve new levels of accuracy and reliability thanks to a fully redesigned mechanism. The model is simpler compared to its predecessor, requiring zero hardware and fewer printed parts. That means more fun, sooner!

Assembly:
https://www.youtube.com/watch?v=RyK1rsiBM18

Features:
    New sights make it easier to aim, they double as a tool for replacing an internal band.
    Band storage in the grip.
    Viewing port in the slide for monitoring band count.
    Its pretty clicky:)

Tools and materials:
    PLA or other stiff plastic - for printing.
    60mm of filament - for pins and hinges.
    Knife - for support removal and cutting filament pins.
    Glue or double sided tape - for assembling the magazine.
    Rainbow loom rubber bands!

Printing:
    0.2mm layer height
    3 perimeters, 3 bottom layers, 3 top layers (Print the trigger with 6 perimeters, 4 bottom layers, 4 top layers)
    25% infill (Cubic)

Mag Fed RBG V3, BURST edition.

Slide.stl

🪄🪄🪄 **Free for a Limited time**🪄🪄🪄

✨ A Customizable Wand That Actually Fires Spells (Rubber Bands)! ✨
Step into the world of magic and adventure with the Rubber Band Wand, a Harry Potter, Dungeons & Dragons, and fantasy inspired 3D printed wand that shoots rubber bands! Designed for cosplayers, role-players, and wizard duels, this modular wand lets you mix and match different styles to create your perfect spell-casting wand.

Key Features:
🪄 Modular Mix-and-Match Design – Build your own custom wand by swapping different wand tips, triggers, handles, and pommels.
🎯 Functional Rubber Band Shooter – Load size 64 or 33 rubber bands, pull back, and fire with the trigger mechanism!
🖨️ Designed for Multicolor 3D Printing – Compatible with BambuLab MMU printers or single-color prints and hand paint.
🎨 Perfect for Cosplay, D&D, LARPing & Wizard Duels – Fun for kids, adults, and magical role-players.
⚡ Accessories Included! – Comes with a target stand and printable target sheets for wizard training.

Printing Tips:
🔹Print with a high wall count for strength (0.4 mm nozzle > 6 walls)
🔹Bambu Slicer File is Named "GEARXYZ RBG Wand UniqueHorn BambuStudio.3mf"
🔹Use tree supports for the wand tip
🔹Looks good Single color, Need AMS for Multicolor

📜 Want to Sell This?
🔹 Subscribe to the GEARXYZ Commercial License.
🔹 Get access to wand styles & new releases.
🔹 Print and sell legally while keeping 100% of the profits!!!

Rubber Band Wand (Unique Horn)

GEARXYZ RBG Wand UniqueHorn Full Wand.3mf

Take your aim to the next level with the 300S FlexViper Rubber Gun & Target Set! Designed for precision and fun, this rubber-powered gun comes with a set of creative targets to make every shot count.

This is part of my '3D printing your most liked comments' challenge series, make sure to comment on the video for this product to have your idea printed next! Like and subscribe to stay tunned! 

Sleek and Durable Design: The FlexViper combines functionality with a modern aesthetic and easy-to-print parts.
Recommended Rubber Bands: For best results, use 25x1.4mm rubber bands. Find them here: https://amzn.to/4iHiPV6
Complete Set: Includes STL files for the gun and a variety of fun targets to keep your skills sharp.
🎁 Free STL Alert: Be among the first 100 members to join our Discord community and get exclusive premium STLs from our portfolio for free!

🔗 Join the community here: https://discord.gg/WJeu2fFRTQ
🔔 Follow and share: Stay tuned for weekly updates and original 3D designs.

300S FlexViper Rubber Gun & Target Set

300SFlexViper_V1_MiniNerfGun_V2 v37_TOP PLATE GUN.stl

✨ A Customizable Wand That Actually Fires Spells (Rubber Bands)! ✨
Step into the world of magic and adventure with the Rubber Band Wand, a Harry Potter, Dungeons & Dragons, and fantasy inspired 3D printed wand that shoots rubber bands! Designed for cosplayers, role-players, and wizard duels, this modular wand lets you mix and match different styles to create your perfect spell-casting wand.

Key Features:
🪄 Modular Mix-and-Match Design – Build your own custom wand by swapping different wand tips, triggers, handles, and pommels.
🎯 Functional Rubber Band Shooter – Load size 64 or 33 rubber bands, pull back, and fire with the trigger mechanism!
🖨️ Designed for Multicolor 3D Printing – Compatible with BambuLab MMU printers or single-color prints and hand paint.
🎨 Perfect for Cosplay, D&D, LARPing & Wizard Duels – Fun for kids, adults, and magical role-players.
⚡ Accessories Included! – Comes with a target stand and printable target sheets for wizard training.

Printing Tips:
🔹Print with a high wall count for strength (0.4 mm nozzle > 6 walls)
🔹Bambu Slicer File is Named "GEARXYZ RBG Wand Free BambuSlicer"
🔹Use tree supports for the wand tip
🔹Looks good Single color, Need AMS for Multicolor

📜 Want to Sell This?
🔹 Subscribe to the GEARXYZ Commercial License.
🔹 Get access to wand styles & new releases.
🔹 Print and sell legally while keeping 100% of the profits!!!

rubber band gun

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Mag Fed Mini Rubber Band Gun

Mag Fed RBG V3, BURST edition.

Rubber Band Wand (Unique Horn)