I have this small neat gun H&K G36C IdZ dual power. It chrones at about 230 fps and manual says it's 0.5 J.
Here is a link to exact model I have:
https://www.shoot-club.de/h-k-g36-c-idz-sandfarben-dual-power-softair-gewehr-6mm/a-13224/
I was playing CQB with it and was very happy about...
