Good day folks. I have a no name .22 revolver from around the 70's I believe. The hammer will not lock back with the gun held up, and will only sometimes lock back with the gun held at my side. I have replaced some of the Internal springs but nothing has helped so far. I have the parts diagram and all seems to be there however I have not taken the gun all the way apart due to insecurities about my skills. I would gladly pay someone to look at it I'm just not sure who trust taking it to? Any help or info would be greatly appreciated!!