Ok, in the next following weeks I heated water with soap and cleaned the metal parts, the water came out dark brown so it was dipped in that goo, I greased em up and then get the stock into my car with trash bags and napkins, all the cosmo crap came out 3 days later, I wiped it off and reassemble it. Everything went nicely.
Went to the range today and fired 60 shots. No missfires, not a single jam. I bought light ball russian ammo in a can, 70 bucks, silver tip with red ring on the brass. It was a wonderful experience.
I fired at 200 yards, I will post the pics and a video soon!