This Tokyo Marui original H51-21 cylinder valve spring is designed specifically for the Hi-Capa 5.1 gas blowback pistol series. Essential for maintaining optimal gas efficiency, it assists in the smooth operation of the blowback mechanism, helping restore your pistol’s reliability if experiencing leaks or inconsistent cycling.
- Manufacturer: Tokyo Marui
- Compatible with Hi-Capa 5.1 GBB pistols
- Direct replacement part
Ideal for repairs or routine maintenance. A practical spare for any Hi-Capa user.










