Next in line for this mod is one of my Grade II Belgians.....just kidding!
Semi-autos generally don't suppress quite as well as bolt actions for example, but with the bottom eject, the SA-22 should be pretty decent.
This particular rifle that I bought brand new is still a little finicky with both subsonic and HV ammo, and I am hoping that after a higher round count it will continue to improve reliability wise. Suppressed subsonic should provide a good balance of blowback pressure, and with it being suppressed I will be able to put even more rounds through it. The majority of the firearms that both my shooting partner and I typically bring to the rifle range are suppressed, so we are quite often operating without ear pro until we need the line to go "loud" versus "quiet".
I did a search on integrally suppressed SA-22s, and came across a vid of one from ARMTAC. When I checked their website, I couldn't find the product though, so maybe they only prototyped it without going into full production?