SRS Air stock HPA Engine (discontinued, please see new model)

The new Atomic Airsoft SRS HPA engine is the quietest engine on the market, unlike others this engine is purely electro-pneumatic, meaning there are no moving parts. the bolt pull is effortless and only 20mm! we have built this HPA engine to be housed in the stock rather than in the cylinder so we can use a larger solenoid making the unit deadly silent. If you think a MTW is quiet this is about half the noise of a silenced MTW.
Our custom fire control unit has been programmed with about 1400 lines of code and tuned to release the air in an “S” curve making the trajectory of the bb very flat when paired with a decent hop rubber, @2.1 J targets out to 100m are a reality using .43 gram bbs.
The unit is easy to fit and can be converted back to spring in a few minutes. (not sure why you would ever want to)
The trigger board is fully adjustable in pull distance, if you like a hair trigger or a longer pull this can easily be achieved.

you will need to purchase a 11.1v lipo, we reccomend the 350mah versions

This item is discontinued and been replaced with a new version CLICK HERE FOR NEW VERSION