Spare parts for GHK M4 GBBR
－Magazine gas type output valve, copper and iron made.
－Compatible with GHK G5/M4/G5-GMAG gas magazine.
－Please use silicone oil as maintenance, so that the air-tight can be mainten in good condition.
－The wear of o-ring inside the valve is normal situation. It can be replaced if necessary, please [click here] and refer to the replacement.