WYSHTECH Airsoft's guide centers on the EPeS v2 and v3 cylinder heads, popular choices for airsoft builds thanks to their duralumin core and nickel PTFE coating. This coating reduces friction, improves air seals, and — unlike standard finishes — is durable enough to withstand contact with other metal components without degrading.

A notable feature is the inclusion of set screw holes, which lock the cylinder head firmly into the gearbox shell. Dialing in these screws eliminates wobble and tilt, keeping the nozzle properly aligned as BBs enter the hop-up chamber and producing more consistent shots.

Installing these requires some trial and error to find the ideal screw depth, with the goal being a fit tight enough that the cylinder head stays put even when the gearbox is inverted. The guide also covers various stem lengths, padding options for different replicas, and an optional brass ring for players needing extra tappet plate stroke.