22lr kits for the Glock have been around for a few years now. When they first came out they worked best with high velocity ammo. In some cases they only worked with HV.
Do the current ones function with standard or sub sonic? Is there one that is a good candidate to he a suppressor host?
I've never had any problem using subsonic 22lr ammo in my Ciener Glock conversions. I have had conversions on both 9mm and .45 ACP Glock hosts, equipped with AAC and YHM suppressors for over 10 years, highly reliable. Just keep the pistols clean, they work fine.