VFC MP5 Hopup Arm and Nub V2 vipertech 6061 aluminum internal plunger housing

6061 aluminum internal plunger housing

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

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

The height may need slight adjustment to get the correct height

VFC MP5 Hopup Arm and Nub V2 vipertech 6061 aluminum internal plunger housingThis 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!