RIZER R1 V2 HOP UP
Made on alloy for greater strength.
Will increase accuracy and distance of your gel blaster.
Adjustable via grub screw.
Fit with 9.5mm size inner barrel .
Outer size of the hop-up is 16mm so make sure the inner diameter of your outer barrel is larger than that .
To reach the best performance,you need insert this hop-up into the barrel 10mm roughly .