This nozzle will reduce the muzzle energy of a CO2 powered SSP1 to under 1 Joule.
This makes it legal to play with CO2 in countries with strict power regulations such as Ireland and Italy.
The advantage over Gas is that CO2 can be used at lower temperatures. Installation is easy and only requires very basic tools such as a flathead screw driver, a set of allen keys and medium strength screw glue.