Getsome- I've got to tell you, I've got a SLR-95 that I can't even get the bolt to hold back on(it's so smooth). Also I have a VEPR that is not as smooth, but pretty slick. The american receiver SSR-85B is unbelievably rough in its action in comparison. I've smoothed the hammer, and worked the action manually, then put Tetra grease where wear is showing. Still can't the action to cycle smoothly. Starting to believe it is the American receiver.