1: No clue
2: If you're referring to the Russian military style sling. it was originally designed, as far as I know, to just be used to sling over your shoulder. Nothing more really. I use one, but I have it mounted in such a way that I made it work. I like it for more of a traditional look, but as my AK has evolved, I think I may change it... A Blue Force Vickers Sling or VTAC sling would be very beneficial. I use a VTAC on my AR. It's great. Of course after market sling mounts may be required. The AK platform is becoming almost as versatile as the AR's.