Jaeger Precision show their Jaeger Precision Tokyo Marui MWS Downgrade Valves in this video. In the package, one will find four valves: S, L, VL, and EL, which serve as direct replacements for the original valve. The S valve has power similar to the standard valve. The L valve is a low-power valve that reduces a standard rifle's power from 1.3 joules to approximately 1 joule.