I've designed these airsoft silencer/ suppressor elements to make them really effective taking gas physics into account. They will work on any airsoft replica but be especially effective on gas and HPA systems. I've designed different sizes and the idea is that you use one spacer and then different elements going from long to small. As such you can create your own silencer insert.
Be aware this is for airsoft use only!
This part is meant to be used as a spacer for a 30 mm outer diameter silencer (28mm inner) and first expansion chamber (ideally min 2-3cm before first element) which can be cut to the right length.