5KU AEG Barrel Type Hop Up Chamber for WA / G&P WOC M4 Series GBBR - Keychain Included

Description

5KU Hop Up Chamber Unit | Rear adjustment | Full metal construction | For WA/G&P WOC M4 series airsoft GBB rifle with AEG type barrel | Replace Western Arms M4 series gas blow back rifle original Hop Up unit | Accomplish to use with AEG type inner barrel | Item Weight (gram): 20 grams /w packing 30 grams | Built Material: Aluminum