ak47 newbie

I recently purchased a WASR-10, i have a few questions. 1.This is the bolt out of my WASR-10, I’m told its single stack? 2.Are the last 2 digits of my serial the year my WASR-10 was made? 3. I thought all of the newer WASR-10s came with a double stack bolt? 4. Does it make that big...