- New Design For Direct Fill Up To Gear Box System. No More BB Running Tube.
- Full Automatic Wiring Upload BB.
- Pressurized On / Off For Bullet Filling.
Description:
- For TOP / All Other Brand M249 SMG.
- No Wire, No Winding, No Modification.
- Operation By AA 1.5v Battery 2 Pcs. (Not Included)
