May I suggest these little UTG dovetail to picatinny adapters? They work awesome for red dots on Crosman. They come in packs of two, they could handle a scope too. UTG .22/Airgun to Picatinny/Weaver Low Pro Snap-in Adaptor https://www.amazon.com/dp/B007BNHFLQ/ref=cm_sw_r_cp_api_glt_i_PANJ429BFGHP5HFDN3VC
Magic 🎩
But for real though, this is what I used: UTG Adapter
Its solid, works well.
--EDIT--
This is what I used to mount the red dot. The QD is clipped onto the saddle ring.
Have you considered a small red dot/reflex like a Nikon P-tactical SPUR, Burris Fastfire 3, etc?
It is like irons, but only one focus point, so easier to use than irons. Quick to get target alignment too because the dot can be pretty much anywhere in optic and that is where you will hit (doesn’t have to be perfectly centered)
Just look for one with the smaller dot (3 MOA dot or smaller) as the larger ones are meant for handguns at close range.
You can look for insert adapters to mount regular weaver type rings/mounts to 3/8” rails as well. That’s how I mounted the SPUR to a .22 without having to worry about drilling holes for other bases as my .22 isn’t drilled/tapped.
Having both a scope and some sort of see through rings means your scope is going to be much too high for a proper cheek weld when using the scope. Same with mounting something offset, harder to be consistent without a good cheek weld.
If the rifle has an 11mm dovetail rail on it, that should be fine on a .22lr. I've stuck those on my spring-piston airguns while waiting on a proper set of scope rings and they held on just fine. Airguns believe it or not are notorious for wrecking optics with the bucking recoil the piston produces.
Edit: Whoops, I thought you were talking about these little guys, they sit flush in the weaver mount and don't add height to the optic you're mounting.
UTG makes dovetail to piccatiny adapters that don’t increase the height. They also make regular dovetail mounts.
https://www.amazon.ca/UTG-Dovetail-Picatinny-Profile-Adaptor/dp/B007BNHFLQ
I use these for red dots on my marlin 795 and xt22. They work great and are cheap
You want these.
https://www.amazon.com/UTG-Airgun-Picatinny-Weaver-Adaptor/dp/B007BNHFLQ
I've got mine to clamp a truglo 2x42 dot sight onto my PP700S-A.
I got these for my Marauder and they work well.
https://www.amazon.ca/UTG-Dovetail-Picatinny-Profile-Adaptor/dp/B007BNHFLQ this should do the trick