This hopup is suitable for both M4A1 Gen 8 and Scar V2
A hopup creates a backspin on the gel ball which gives a much higher travel distance, The backspin also increases the accuracy of the blaster significantly!
Please note: If your blaster has a higher FPS of 300 it will not be compatible
M4A1 Gen 8
1 x DK M4A1 Gen 8 / Scar V2 Hopup
1 x Allan Key
2 x Grub screws