I noticed that the cocking knob/ safety has a repair on the top wing on the right side. Looks to be some sort of brass braze. The repair is on a Finnish M39 B barrel that I just recently got and the cocking piece was made by Izhevsk. I have not seen any other repairs on bolts before, did the finns to this kind of repair or repairs to bolts? There is still some brass remnants on the inside top wing. And do you guys think it's safe to use?