This is the worst rear sight I have ever had. I ordered and had no issues with shipping; I mounted the sight and could not sight in the rifle for windage even with the knobs cranked all the way to either side. After continuing to shoot way left I noticed that the box holding the 02 and peep sights would wiggle back and fourth, there were also heavy tooling marks on the aluminum parts of the sight as well I contacted NcStar and they said they didnt know of any defects with the product and they told me to send it back ON MY DIME! After receiving the replacement a week later: the sights still wiggle and there were even worse tooling marks on this sight. They would also not allow a refund once mounted on a rifle regardless if the product is defective. You can tell these sights were made in China. Terrible Product.