I saw today that Surefire makes a Beryl type mount as well and is much cheaper. Of course its not made out of aluminum but that Dupont plastic. So far the Beryl mounts I've seen are for the Saiga rifles but Surefire has one for the Saiga 12. Can anyone explain how it mounts on the Saiga 12? The rifle mounts uses the rear site leaf but there isn't a rear site leaf on the Saiga 12 just a little tang. Does it screw on or hook on that tang? Any help would be appreciated. I'm trying to outfit my Saigas without breaking the bank.