Well, Roland hit the nail on the head, the rangefinder is an M4 or M4-2. Now to figure out the differences of these two. I've read that the M4-2 finders is a cheaper version of the M4 finder. Also read that it flares easily. Can someone enlighten me on the flaring problem. I can still see the rangefinder image pretty good with strong sunlight coming in the viewfinder. Is there a way to make it disappear as some have eluded too. Thanks