Vism pro series junk sights - VISM Pro Series Top Mounted Deployable Front and Rear Sight

The VISM Pro Series flip up sights, DO NOT BUY THEM!!! I purchased a set off of Ebay for a fair price thinking they would be of at least decent quality. They were not. Mounting the sights is a bit of a pain due to the two-piece design. But the worst part is, the pic mount is will not square up on the pic rail. When the screw (single screw) is tightened the sights (both of them) will rotate counterclockwise. The construction is a bit cheap also. I can only attribute this to the country of origin, I will let you guess where they are made. Vism's packaging states they are designed in the USA, but they are actually made in China, let the cat out of the bag there. These sights are not worth your hard-earned American dollars, and they are definitely NOT "pro" series. They are junk. Lesson learned, the hard way.