Bought this Yugo AK have some questions

[USMC88-93]

How does the receivers top cover work? There seems to be an extra button on the side I have to operate.
What is and where can I get the correct sling?
Has Tapco parts, for parts compliance. Should I worry?
http://img.photobucket.com/albums/v651/PhotoTWB/YougoAK.jpg

[FTW2012]

Tapco makes good AK parts, I would go elsewhwer for AR parts though.
To remove the top cover there is a button on the back center of the cover, press that in and snap the cover off

The sling you have looks to be Chinese

Here is an original Polish one:

http://www.gunbroker.com/Auction/ViewItem.asp?Item=61483071

AK's are hard to hurt, shoot it & have fun doing it!
No need to worry

[Slow]

you have to push the button in on the side, it locks the rear latch, then push in the latch to remove the top cover.

[Para Driver]

when you push in the latch, it has to go in and down just a little, so it hangs on the trunion.. then the top cover lifts off.. carerfully remove the spring assembly immediately...