O-rings for gas gun piston heads in sizes for WE AR15/SCAR/MASADA/PDW, WE MP7 and WE AK/SVD.
- WE-AR - 15×2 mm
- WE-MP7 - 13×2 mm
- WE-AK - 18×2 mm
- Made of NBR with a hardness 70 sh
- Package contains 5 O-rings of selected type
Spare seal kit GBB piston head