Cold Shot M.O.A.B./M.R.A.B – No More Reticle Moving
Many years ago I read a letter in a gun magazine that is today as fresh in my mind as it was when it first read it. You know the kind; a novice gun owner was writing for advice from one of the magazine’s self-professed experts. The writer of the letter was concerned over the fact that his scope reticle wasn’t moving in the precise manner he thought it should. His scope, like many others, was designed to have a 1/4 MOA adjustment. In other words, each click of the turret dial was suppose to move the point of impact by 1/4″ at 100-yards. To his annoyance the shooter found that it was often necessary to jockey his crosshairs back and forth in order to achieve the exact setting he was looking for. Fire a shot – impacted an inch high. Adjust down 1 MOA and fire another shot. Impacted 1-inches low, and it went on from there. As is frequently the case, the magazine published both the shooter’s letter and the “expert’s” advice, which went something like this. The owner of the scope was told that his scope was in severe need of being repaired and that he should immediately ship it back to the factory in order for it to be gone through and the problem fixed. Oh by the way, the magazine was not The Varmint Hunter!
The reason why that particular letter has stayed with me all those years is because of the seemingly faulty advice that was given. Certainly there could have been something wrong with the internal workings of the scope, but I’m betting it was nothing that a repair shop would, or could correct, because I have frequently found myself facing that same problem. And no, this isn’t a trait akin only to low-cost, bargain-basket scopes that were built and assembled in some obscure Asian rim sweatshop by workers paid pennies on the hour. On the contrary, in many of my own cases I had to swallow hard when it came laying my credit card down on the sales counter to purchase some of those very same scopes. While I can’t tell you why this problem occurs, I can tell you that it is a more common phenomenon than the scope manufacturers would like you to believe.
Clearly, this situation can become a bit trying for anyone attempting to initially zero their riflescope, but for those shooters that prefer to simply “dial-in” their shots for long-range shooting it can become a major issue to content with. Think about it – a couple of inches at 100-yards translates into a foot at 600-yards. The good news is that there is a brand new and much more reliable alternative to frequently moving the reticle of your scope around. It is called the “Minute of Angle Base/Mil Radian Adjustment Base”, or “M.O.A.B./M.R.A.B” for short. When installed on your rifle the M.O.A.B./M.R.A.B allows the shooter to compensate for the trajectory drop of their bullets in a mechanical way rather than optically. In other words, rather than moving the reticle up and down to adjust your scope variations in range you can achieve the same result by elevating or lowering the rearmost portion of the M.O.A.B/M.R.A.B. By doing so it eliminates unnecessary wear inside the scope; it provides you with a greater range of adjustability; and in my way of thinking it is a more reliable and dependable way to adjust your point of impact without ever having to deal with the delicate internal workings inside the scope.
The basic concept of adjusting the point of bullet impact through the use of the mounting base is not a new one. It has its roots within the first production riflescope built in 1855 by William Malcolm. Malcolm was the first to offer an adjustable ocular lens and he did so using his own adjustable mounting system that moved the entire scope tube vertically or horizontally in order to align it with the target. Jim Mullin of Cold Shot LLC of course went much further in his development of the M.O.A.B/M.R.A.B system than Malcolm did over a century and a half ago. Unlike Malcolm’s somewhat crude and rudimentary attempt, Mullin’s system comes with the CNC precision necessary to achieve the highest degree of accuracy at ranges never conceived in Malcolm’s days.
The M.O.A.B/M.R.A.B system is used in conjunction with a normal full length MIL-SPEC M1913 Picatinny rail. When in place it allows the shooter to dial-in their scope by simply turning an index dial located at rearmost portion of the M.O.A.B./M.R.A.B. I hesitate to make such a rude comparison, but the index wheel of the M.O.A.B/M.R.A.B. actually appears similar to a scaled down version of the old time label-marker dial. You know the kind; where a turn of the wheel allows you to select the letter you are looking for. Obviously, there was never a label-maker ever built that came with the precision, close tolerances and quality of construction that are inherent in the M.O.A.B/M.R.A.B There are 5 models of M.O.A.B/M.R.A.B to select from: 150 MOA, 300 MOA, 72 MIL, 144 MIL and a specific unit intended for M-1A/M-14 rifles. In most shooting situations I believe the Model 150 MOA or 72 MIL is likely the best choice and provides an adequate amount of adjustment for most rifles and shooting scenarios. The 300 MOA,144 MIL is possibly best suited for applications like the Barrett M-87A1 and other Extreme long range large bore weapons.
— Jim Mullin