Airsoft GI recommends the TTI Airsoft CNC Hop-Up Unit as a replacement for the iffy hop-up unit of the WE Airsoft Galaxy G Series... "If you have a WE Galaxy G-Series Airsoft Pistol, then you know how irritating the hop up unit can be. TTI Airsoft has come up with the perfect solution with their new CNC Hop Up Unit! They have designed their hop up unit to be user friendly and as effective as possible! Cisco gives us a quick run down!"