[GHK] M4 / MK12 Airsoft Hop Up Chamber System[VSR Bucking][2022 New Type]

Description:

• The GHK M4 Hop-Up System for the GHK AR GBB series is a 2022 new system, it helps for easy to adjust the Hop-Up without removing the handguard.

Specification:

• Part No.: GHK-M4-KIT-04
• Material: Nylon Plastic
• Weight: 37g*
• Colour: Black
• Compatibility:
• Power (Muzzle Velocity): 

Contents:

1. Hop Up Chamber x 1set