Gas ram 4 hatsan 150

[leadslinger22]

Anyone out there know which gas ram will work in my hatsan torpedo 150?  And if not how do i find out which gas ram would work without taking the rifle apart and measuring the spring?  I'm new and have lots of questions so i will appreciate all the help I get.

Thanx in advance
         Mack

[supertech77]

maybe e-mail or call hatsan and get the spec for piston stroke and chamber diameter,like on the wfh its 125x19,but that is a different set up.good luck,and hopefully one of the tuners on the site may know exactly the spec's,,

[leadslinger22]

Thanx supertech77, i will be contacting hatsan as soon as humanly possible.