These have an amazing impact guaranteed bang for Buck best performance upgrade you can give your blaster. We have spend well over 100 hours perfecting this model to give a WOW factor.

JM M4A1 GEN 8 / SCAR V2 HOPUP fits stock out of box and modded

Best thing since sliced bread!!

☠☠These give such a great advantage it's literally unfair for anyone else without one☠