Talked to CMMG and FNHusa at the NRA convention.
FNHusa says they have some plans in the works for the PS90 and FN 57, but they wouldn't budge on 22lr conversions. Just 5.7 ammo "news".
CMMG: I spent about 15 minutes talking to the guy there (great interaction). They own the patent for any 5.7x28 to 22lr. So FNHusa is stone walled on doing it. But CMMG wants to find a company to take the 22lr conversion kit and put it out to a manufacture. Told them to please talk to FNH. Also put forth a FN 57 conversion and the eyes brightened up. Was told that wouldn't be too hard at all. Might have struck up something there
CMMG told me they have had great interaction and repoire with FNH, so if they are talking, I am have high hopes.