Benjamin Marauder Regulator

I guess I misunderstood that your rifle was a standard rifle with a regulator added and not the factory regulated version.

If you have a Huma regulator and a standard M-Rod valve and have not changed the valve poppet spring to a lighter spring and your reg pressure is set to around 2000 psi I can see no reason that the AGR ssg could not be made to work. The 2000 psi is well within the working pressure of the standard valve, many people tune for 2500 to 1500 psi for unregulated rifles. The hammer does not know there is a regulator in the mix, it is just popping the exhaust vale open against regulated pressure, 1800 to 2000 should work. But, could be wrong. The factory regulated rifle is different in the way the valve is set up from Crosman.
I have a new fully stock regulated .22 LW field n target.
 
This is not an SSG solution, but you can still get Hill lightweight hammers, lighter hammer springs (SSS), lighter valve springs. That may help but if you want a lot of power you may not get it with the stock regulator. I looked at mine when I had a leak, and there is almost no plenum volume. I put in a Huma that fits in the same space but the reg is more compact, and partly tucks into the gauge port to offer some more some plenum.
 
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This is not an SSG solution, but you can still get Hill lightweight hammers, lighter hammer springs (SSS), lighter valve springs. That may help but if you want a lot of power you may not get it with the stock regulator. I looked at mine when I had a leak, and there is almost no plenum volume. I put in a Huma that fits in the same space but the reg is more compact, and partly tucks into the gauge port to offer some more some plenum.
Thank you.
Not worried about high power but rather a light, smooth efficient shot cycle. I’ve got it tuned at 800fps all stock now at 60 shots but it still sounds like I’m getting hammer bounce.
Just want it smooth and quiet. 800fps is plenty.