When purchasing Weaver or any other brand from eGoods365.com store, you can be sure that (a) you are purchasing from US based company with the most responsive and friendly customer service; (b) an authentic, not a counterfeit and not a refurbished product.
Keep your optics locked down tight with the additional hold of Weaver's SureThread. When mounting optics this thread adhesive helps prevent the loosening of mounting screws caused by the shock and vibrations generated from recoil. Take the time to mount your scope properly and then take the time to ensure it stays that way. Use Weaver SureThread.
