hop up gbbr ghk ak/553 maple leaf hot shot hop up rubber 60 70 75 80

maple leaf hot shots hop up rubber for ghk ak /553 gbbr Options: 50 degree (green) for muzzle velocity below 110 m/s 60 degree (yellow) for muzzle velocity 90-120 m/s 70 degree (blue) for muzzle velocity 110-140 m/s 75 degree (red) for muzzle velocity 130-150 m/s 80 degree (black) for muzzle velocity over 150 m/s