I'm new to the AK world, and considering the purchase of a Zastava AK. I am wondering how the optic rail, which is somehow mounted to the side of the receiver, will hold zero if removed. My use for this rifle would be inside 100 yards, and I'll mount a red dot on it. Additionally, I'm assuming mounting a red dot in this manner is the most accurate? (versus mounting it on the dust cover or a railed handgaurd?)....thanks for any help