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[DeTrevni]

Okay, last thread on this subject for a while, I promise! Well, that is unless I find yet ANOTHER thing that's messed up with it, most likely because of user error...

Anyway, in light of my previous thread regarding changing the valve spring, would it be possible to put in a rear velocity adjuster? I'm thinking by replacing the internals of the Rainmaker's stock LPR with a shim that attaches to a screw or a bolt threaded through the LPR adjuster in the back of the cylindrical LPR housing. The shim would press against the valve cup seal, and by screwing the bolt in or out, you can adjust pressure on the valve spring, altering the return force on the vavle pin itself. This would let more or less air out of the valve when the hammer hits it, changing velocity, but in theory maintaining consistency.

My only concern would be what the velocity range would be. I'm hoping this setup will allow me to run unregged CO2 (like my 4oz), which will lighten up my load a bit. Or even 12g, but I don't see that being the most practical approach on a Rainmaker, even when it's been pumped! Heh. BUT, unregged CO2 or air is at a high pressure, and may yield velocities basically too fast for field play, and turning the theoretical RVA too far in or out may cause malfunctions.

Thoughts?

[Rainman229]

in theory it would work. But it would need to be a sealed system. Can be done.

On the rm factory reg. Do's it have the spring or wave springs in the cap?
The reg spring/s could be shot too.

[DeTrevni]

Nah. The PRM has Marty's Mods, so the rear reg is now a volume chamber. I do have a stock reg lying about, so maybe I can use the piston (if it's set up like I imagine it is) to create a sealed RVA.