Ok I did see a pic of a AIR rifle in 5.45 that seems to be a Romanian version of a Krinkov and it did use the Romy flash hider along with the RPK.
This list seems to be most accurate
AIM (7.62x39) - Romanian version of the AKM came with a fixed stock, forward pointing grip, muzzle nut or slant brake (May also been called AIM63)
AIMS (7.62x39) - Romanian version of AKM came with a underfolder stock, rear pointing grip or wire folding stock and forward pointing grip and either a muzzle nut or slant brake (May also been called AIMS 63)
AIMS 74 (5.45x39) - Romanian version of AKS74 comes with wire folding stock, unswept 45 degree charging handle, three shot burst, AKM style gas block with accessory lug, bakelite upper handguard and forward pointing grip lower hanguard, bayonet lug on front sight block and Romanian version of AK74 brake 22mm. Some have a grenade launcher where the lower handguard would be. (AIM 74 I guess would be the fixed stock version if they made any)
AIR (7.62/5.45) - Romanian version of the Krinkov came with Romy wire folder, traditional handguards, cone flash hider, and might be issued with 20rd. magazines. (7.62 version may have been called AIM80)
RPK (7.62/5.45) - Copy of Soviet RPK came with cone flash hider (RPKS has wire side folder).
PSL (7.62x54) - Romanian version of a Dragunov although totaly different.
Some AIMS 74 rifles could possibly be in 5.56 NATO and there probaly was a AKM in 22LR for training also but can't find much info on either.