Initially designed for the TAC-41 “GBB” hopup, this hopup rubber can fit inside most of airsoft guns using “GBB” hopup rubber. Transparent silicone for easier installation, this kit includes 4 hardness:
FAST (Field Adjustment SeTting ) hop up for Silverback SRS (all versions) and HTI. 6061 aluminium CNC machining hop-up unit for the Silverback SRS. Allows to adjust your hop up in-game without any tool, in just few seconds. This hop…