Slide right on your ak. Brand new from my Romak 3 I just bought. Iluminated range finder. Comes with canvas bag, ENGLISH directions, rubber eyepiece,lense cover and battery. Want 90.00 shipped. Postal MO please. A guy bought it 2 weeks ago but I have yet to see MO. He said he would send it soon. Cant wait. First email to LBBMK@comcast.net gets it.