I sure coouldn't find any information on these rifles.  I do know that Armscor/Rock Island Armory makes firearms in the Philippines, but I'm sure that's something you already knew.  If you end up finding anything out about these rifles, let us know, please! “We are all capable of believing things which we know to be unexpected.

Hey Martin! I actually saw an ad for Rock Island Armory .22 LR rifles recently. They caught my attention too, but I'm not too familiar with the specifics of their build and accuracy. Maybe some other members here can share their experiences with those rifles? By the way, have you checked out Glock OEM FFL frames? If you're interested, you can follow https://uspatriotarmory.com/product-tag/g-oem-ffl-frames for more information. Anyway, I'm also new here, so let's hope someone can give us some insights on those Rock Island rifles.