@Yo Noise level is relative to different folk. How loud exactly is a RAW? I don't find an HW95 in my 1/2 acre lot neighborhood very loud or offensive to my neighbors at all, but you don't agree. So, is the RAW as loud as a Springer? Louder? Less? Also power level and caliber may make a difference, no? Dang things have a YUGE moderator, I kinda thought it would be half ass effective at least.
Also, if you have the space and means to build an underground range, but can't due to permits, why not try an above ground? You would just need to sound proof it enough depending on if shooting firearms or just airguns, the latter being much easier. I have been thinking of doing something like that here, but not sure that I can or will, time will tell. A structure just tall & wide enough to sit at the bench and as long as my lot permits, maybe 40 yards max I think. Just a thought.