Guarder Hop Up Bucking for KSC M4 Magpul 70 Degree GBB

Guarder

34759

Guarder Hop Up Bucking for KSC M4 Magpul 70 degree version . Bucking for use on the KSC M4 / M16 gas blowback carbines. Will not fit the AEGs. If you want a higher quality, non-factory bucking, this is it!