Pressure ratings are usually 10 bar.
You have a ram ...
Youll need a buffer tank together with a 5/2 or 3/2 valve (double acting OR single acting cylinder ) all rated @ 10 bar or more to go with your co2 cylinder,regulator and pressure relief valves one High pressure ( 1000psi) and one low pressure.

Make a weight guesstimatiion before buying everything .....you may find it difficult to get down to the 12kg limit.





(Message edited by woody on June 16, 2007)