VFC MP5 Hopup Arm and Nub V2 vipertech Special chamfering of nozzle to

Special chamfering of nozzle to give the best seal to the inlet valve

-Cutout for tension O rings specifically for open bolt guns such as the VFC M249

-Black Nitrided

(helps to close receivers that previously needed to remove the pivot pin)

please note that the compression part of the spring should be connected to the nozzle pin while the tension part of the spring should be connected to the rear assembly that gets screwed into the back of the bolt

VFC MP5 Hopup Arm and Nub V2 vipertech Special chamfering of nozzle toThis arm provides more consistent hopup tension on the bucking for more consistent BB backspin. 7075 anodized aluminum. Rubber Nub. This new version is CNC machined rather than 3d printed. This hopup arm allows for the use of a rubber nub which will greatly improve your hopup consistency!