To a degree. The safety knob from the Mukden will fit on the bolt from my Koshikawa sporter, but it will not engage. I think this has something to do with the dimensions of the protrusion on the bottom. I measured them, they are both .230 wide, but the protrusion on the Mukden knob is taller. I have ordered another small tang safety knob to compare and contrast and see if this characteristic is common to all small tang safety knobs, or if the one on mine is defective in some way.