Guns Modify Magazine Gas Bucking #0/70°(+0.03or+0.08) TM G-Series

- Extreme Custom Mag Gas Buck #0/70°(+0.03or+0.08)
- 0.05 thickness Stainless Steel shim x1
- For TM/GM G-Series

To find the best clearance by adjusting the positional relationship with the nozzle