Hop-Up

What is HOPUP?
Hop-up is a device installed between the inner barrel and gearbox of an Airsoft gun to create "back-spin" effect on Airsoft bbs as they are projected out of the barrel to provide counter-gravity / longer range.

Hopup Adjustment 101:
Goal: Have your bb fly as far and as accurate as possible!
Key: Select the right bb and adjust your hopup strength accordingly.