SKS; Russian, China (early military not late commercial production, the early productions were very close to the Russians) Yugo, Albania, Romania
AKM; Yugo (original import and then military) , Russian (military not commercial Saiga) , Polish, Bulgarian, Romanian (military not commercial SAR/WASR) Hungarian, China (military), Russian commercial, China commercial, Any screw build, Romanian commercial
For the AK variants; Chech VZ58, Valmet, Galil
All of the military AKMs will be built from parts set as military AKs cannot be imported intact so quality is going to depend greatly upon reciever used and experience level of builder however the basic heart of the kit is what is being ranked that being the quality of parts in original rifle....