About the WISP foam dart blaster
A tiny, easy-to-print single-chamber foam launcher built for simplicity and reliability. Designed around the LB32
pre-primed cartridge system (cartridge files included). Minimal parts, minimal hardware — ideal for fast prints,
easy assembly, and simple maintenance.
Watch the blaster video: Click here.
Cartridge assembly video: Click here.
Important Notes
- Digital download — STL files only.
- LB32 pre-primed cartridges included and compatible with this blaster.
- Cartridges are powered by exercise (resistance) bands; the launcher body itself only requires office rubber bands
for simple retention tasks.
This product includes
- STL files for full WISP 3D printing (ZIP)
- Printing instructions (JPEGs inside ZIP)
- Assembly and troubleshooting videos (links inside
Instructions.pdf) - LB32 pre-primed cartridge model files
Key Features
- Single-shot, single-chamber shell-accepting action for quick, tactile reloads.
- Very compact footprint — designed for small prints and easy carry or storage.
- Extremely low hardware requirements — parts assemble without metal springs or specialty fasteners.
- Blaster itself requires only office rubber bands; cartridges require exercise (resistance) bands (~1 mm thickness) for power.
- Mega-sized 95×20 mm foam darts reach around 60 FPS with recommended bands.
- Simple hammer + trigger interface — pulling the trigger releases the hammer; operating the hammer also opens the chamber for easy loading.
- Fully 3D printable in PLA and designed for glue-free assembly.
Non-3D Printed Materials Needed
- Office rubber bands (small, for blaster hammer, trigger and chamber locking mechanism)
- Exercise (resistance) bands (~1 mm thickness) for cartridge power
- Plastic-safe lubricant for smoother moving parts
- Mega-sized 95×20 mm foam darts
Recommended Tools
- Pliers
- Scissors or snips
- Hobby knife (use carefully)
- Screwdriver
Printer Requirements
- Minimum bed size: 200 × 200 × 200 mm
- FDM printer only (load-bearing parts are not suitable in resin)
- Use standard or impact resistant PLA or PETG with good layer adhesion (avoid very brittle or specialty filaments).
License (Once Purchased)
- Unlimited personal use.
- Allowed to print copies for friends & family (no commercial gain).
- Allowed one commercial sale of a printed unit per digital file purchase.
- Not allowed to modify or redistribute the original digital files.
- For mods, commercial licensing, or using the LB32 cartridge design in other products, contact me (via form on the website or email in the Terms-Conditions-Licence PDF file)
Safety Notice
- Recommended for ages 16+. Not suitable for young children.
- Always wear eye protection when operating or handling loaded cartridges.
- Print exposed parts (especially the barrel) in bright safety colors if local rules require it.
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