As other have said you can get good stuff from China however you normally pay for it. They will make you a Rolex, of S&B scope or Mercedes as good as the actual article but you will be paying nearly the same price. Cheap price is generally and indicator of a cheap build. You may have lucked out.

Let us know how it goes but do as suggested with a heavy recoiling rifle, box test and sticking it in the freezer then onto the rifle.