VFC M4 Hopup Unit (60' Bucking included) 400-550 allowing the user to use

allowing the user to use LiPo batteries without worrying about damaging the gun and a programmable fire control which allows the shooter to choose either full-auto fire

especially for those long range shots

Length: 220

only to find the spring guide sear has dropped and now it slam-fires

-Reduced or eliminated chance to encounter annoyances such as semi-lock

VFC M4 Hopup Unit (60' Bucking included) 400-550 allowing the user to useCompatibility: For H&K 417 Series and compatible M4 M16 Series Airsoft AEG Rifles Material: Polycarbonate Package includes one VFC Hopup Rubber. *c clip NOT included, if you require one please message us before you purchase*