ARCTURUS AK12 / AK15 / AK19 Rear Aperture Sight

It doesn't fit at all. I had to modify the dust cover to at least fit it onto the rail. I honestly wish there was an image of the underside, but here is a picture of the small space provided. I had to remove rail segments to get this to even fit. I am also posting the original AK-12 rear sight in comparison to the AK19 rear sight for comparison. The AK19 sight has more pieces jutting out making a smaller space meaning it won't slide on easily. The space provided with this sight doesn't even sight flush as you will have an overhang (as seen in the picture I provided) I'm still modifying the rear sight by extending that space to allow it to sit farther up and making it similar to the AK12 rear sight.