I know next to nothing about these rifles. I have a chance to purchas one and need some advice. This one has an IMBEL receiver. I beleive most of the rest of it is Israeli. It is a heavy barrel with a built in bi-pod and this thing is heavy. Has wood furniture and looks overall to be in pretty good shape. The owner has never shot it in the twenty or so years he has had it but says I can try it before I buy it. So is there anything to be aware of before I look seriously or is this something best left alone?