aM Ultimate hop up arm for the Action Army VSR-10 hop up chamber Benefits of the CNC version:

Benefits of the CNC version: stiffer

can use standard AA spring return

CNC machined aluminum

Quick synopsis of why you'd want an arm like mine: being a one-piece design we remove a moving component in the hopup linkage (the pivoting nub)

Originally designed to fit the window in the Action Army VSR chamber

aM Ultimate hop up arm for the Action Army VSR-10 hop up chamber Benefits of the CNC version:aM Ultimate airsoft ONE PIECE hop up arm and nub for the Action Army VSR 10 hop up chamber (Masada Arm) Platform: Tokyo Marui VSR 10Hop up chamber: Action Army RED chamber (replaces stock arm and nub) Improves shot to shot consistency Increases effective applied hop up Allows use of heavier bbsThis is a CNC machined version of my hop up arm for the Action Army VSR 10 chamber. Design is exactly the same as the 3D printed version that I've had available