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We received a Facebook message from Grant H., one of our customers asking if our Keystone Rings were .50 BMG rated. He had another brand's rings that were .50 BMG rated and he had issues with them. We responded saying we had not tested them on a .50 before, surprisingly, no one here has a .50 BMG rifle with a spare handful of rounds ready to go. Being the curious folks that we are (George even has the shirt to prove it), we sent a set his way for some testing. The only thing we asked for in retu …

You need to mount your scope to your gun, but how? There are many different options, but one of the most common ways to get your glass on your gun is by using an accessory rail. Which one should I choose? Well, a picatinny rail of course. Picatinny rails have a standardized set of dimensions which allow manufacturers to make rails and rings that will play nicely with other picatinny products. These include cross slot width, length and spacing. There are other options on the market, but w …

What is M.O.A? Put simply, M.O.A. stands for Minute of Angle and is an angular measurement that equals 1/60th of a degree.At 100 yards, 1 M.O.A. = 1" (Technically 1.047")At 200 yards, 1 M.O.A. = 2"At 300 yards, 1 M.O.A. = 3"and so on. We often receive calls where customers request a 20 M.O.A. base because it is taller. 20 M.O.A. does mean that your rail will be slightly taller than a 0 M.O.A. rail, but it is not by much. In reality, our 20 M.O.A. bases are typically around .030" ta …