The hop-up creates a backspin on the ball to make it travel further. A great mod to improve your gel blasters shooting distance! Install is very easy, you just slide it on the end of the Glock.
SKD Glock 18
1 x Adjustable Hopup (Black)
1 x Allen Key
2 x Grub Screw
Please note this product is for a Gel Blaster Toy.