Regular price$16.99
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- For GBB/VSR10 spec inner barrel and without modification
- Anti-frozen silicone material
- Stainless c-ring included for tight sealing. Optional installation.
- Larger & wider contact area inside of BB, has better hop effect with heavy BB
- For Heavy BB only
- The "Shield" shape groove design has better hop effect when tensioner/lever press it
- Retain the steel "C-ring" design for air seal from "Transformer HOP" series
Suggestion of use:
Yellow 60° - muzzle velocity below 100 m/s
Blue 70° - muzzle velocity 100~130 m/s
Red 80° - muzzle velocity 130~160 m/s
Black 85° - muzzle velocity above 160 m/s