説明
  • Easy quick tuning
  • No need remove the handguard to adjust the Hop-Up
  • Universal GBB inner barrel on the market
  • Fixed firmly
  • Not easy be shaken & loose
  • For GHK AR GBB series

Material

  • Hop-Up chamber ( Nylon )
  • Adjustment tool (  Nylon / Steel )
  • Brusing ( Rubber )