Guarder Steel HOP-UP Kit for KSC M4A1 GBB

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Guarder Steel HOP-UP Kit for KSC M4A1 GBB Guarder Steel HOP-UP Kit for KSC M4A1 GBB Guarder Steel HOP-UP Kit for KSC M4A1 GBB Guarder Steel HOP-UP Kit for KSC M4A1 GBB

Guarder Steel HOP-UP Kit for KSC M4A1 GBB

Rainbow8

$168.00 HKD 

For KSC M4A1 & KWA MAGPUL GBB 1st Version

2nd Version Must Change the inner Barrel, You can Choice
Guarder Inner Barrel Series:
GUARDER TN-21TN-22TN-23TN-24

Material: Steel/Plastic/Cooper/Rubber
Weight: 35 g 
Item No.: GB-01-06