This SRS/TAC41 piston cup offers a slightly lower joule output but is the best solution for making your SRS/TAC41 extremely silent. This cup works either in SRS cylinders or TAC41 cylinders. Please use lubricant for perfect results, we recommend motor oil silicon grease or similar.
For reference, a Rapax Lightpull Blue 2J+ spring is giving 2.2-2.3~ joule in an SRS with a Stalker SRS cylinder with a 420mm inner barrel. The stock cylinder will give fewer joules. Results may vary depending on the cylinder being used.
Thumb block seal.
Normal Joule Output but extremely silent.
We recommend buying some spring guide spacers to adjust the joule a bit.
