Lower spring load and designed for normal/stock plunger tube. FPS should be around 125-130FPS range.
Requires a separate Worker Stefan Adapter to work with.
- Metal Breech
- Metal Barrel
- Spring (est 7+KG)
- Breech Oring
- Full Length Breech (FREE)
Choice of front adapter(Sold Separately)
- Metal Stefan Kit Front Muzzle Adapter
- Plastic Stefan Kit Front Muzzle Adapter
Please purchase the kit with a front adapter if you don't already own one. The kit WILL NOT work without the front adapter. If you wish to purchase the kit only, please select kit only at the drop down box.