RTI RTI P3 leak in barrel ?

[dye29]

hi all so I have a RTI P3 and started leaking slowly down the barrel so I changed the ring inside breech block , new valve seat and oring also new valve but when ive installed the air gushes out of barrel now . so I reordered another valve and seat and new orings but same again why is this please .
I just can't get this to seal ok now any tips as all is new .

 

[Carl4E]

It has an air assisted valve. Mine was doing the same thing so I removed the valve and found the spring inside was in several pieces. I got a new spring from AOA after about 4 weeks.

 

[dye29]

hi yes all spring looks fine , ive since tried 3 new valves and seats still can't get it to keep air in any ideas please im really stuck now and Rti don't want to know .