new RIZER V2 has even more adjustment than the R1 very nice
Alloy design for stability and accuracy. This hopup will greatly increase accuracy and distance of your blaster.
Adjustable via grub screw.
Fit with 9.5mm size inner barrel .
Outer size of the hopup 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 hopup into the barrel 10mm roughly .
Milkly gels are best for it .