Oleg: Here is what I did. I have an SAR 3 and wanted to know what a rear peep would do for it. I took a used dustcover from a 7.62 AK, and found that it fit very tight with no play. (The SAR3 cover had play in it when attached) You need a dustcover that fits tight and in the same way each time or the sights will change zero each time you remove it. Next, I removed the factory rear blade sight. Then I took an epoxy putty (don't remember the name) and built up a platform on the back of the dustcover for an M1 carbine adjustable sight to be attached. It worked and the epoxy is surprising strong. I misjudged how much height I needed to build up for the rear to function with the front sight. At maximum elevation the SAR3 is on at 100 yards, and I haven't gone back and built up the platform more. The rear peep and increased sight radius did improve the accuracy of the SAR3, but it is not equal to my AR or Dawoo K-2 by any means. The Kobra sight is a lot less hassle for increased accuracy provided the mounting bar on the receiver is aligned with the bore. Unfortunately, many are not as they are shipped from the factory.