Ye the 510 Extra has the power adjuster on the side , you can wind it up from 7ftlb to about 30 ft lbs .
The fill is about 200 bar and will give about 30 shots .
Thats @
20ftlb in 177
30ftlb in 22
35ftlb in 25
Thats the rifle , not the carbine , which will give half the shots .
The TC ( Twin Cylinder ) will probably double that , but its ugly as sin .