There are a lot of reasons to dislike the Mod Zero M-Zero Scope Mount, but I’ll stop at six. I tried – and failed – to come up with reasons to like it.
It adds points of failure.
When you go to the range to zero your scope on, as claimed by the inventors, two different rifles, you no longer have a solid optic in a solid mount on a receiver (if you’re lucky, otherwise you have a sketchy optic in a sketchy mount on a receiver, or something in between). You have one rifle like this, and one rifle with a thin rail and multiple adjustment mechanisms on top of the rail with your optic and mount on top. This isn’t like a long-range base with additional elevation adjustment, because those things are built like tanks and for a specific purpose – and for rifles that don’t see the levels of abuse which carbines do. Now, instead of needing to check a handful of mount attachment screws for movement, you’re more than doubling the points where a failure might occur, resulting in a loss of zero. Have you ever had an optic/rifle lose zero? Would you like that to happen more often? Buy this product.
It reduces consistency.
Consistency is key to success in a heavily mechanical endeavor like shooting. A consistent trigger pull, a consistent breathing rhythm, a consistently free floated barrel – and, of course, a consistent cheek weld. Whether you’re shooting a carbine at 12 yards or a precision rifle at 1200, having a consistent cheek weld is part of making your shots go in the same place every time. With the M-Zero Scope Mount, you’ll have one rifle with a traditional lower 1/3 or absolute cowitness height optic, and another with a significantly different height over bore. Speaking of which…
The designer must have been high to think most people want optics this high.
Their promo video on Indiegogo states that the M-Zero adds “only 0.6 inches” to the height of an optic over the bore. Does that sound like not a big difference to you? Well, let me burst that bubble by telling you that the height difference between a lower 1/3 cowitness mount and an absolute cowitness mount is about 0.19″ – less than a third of the height added by the M-Zero! Many people prefer either lower 1/3 or absolute cowitness and can easily tell the difference between the two; there is no wrong answer here other than to find out what works for you, but to more than triple the difference on one rifle while making the other stay the same is going to wreak havoc on your ability to shoot properly and to quickly bring the rifle to your eyes and engage targets. This is important whether you’re using a tank-like Trijicon ACOG scope or a diminutive Aimpoint T2 Micro red dot.
ModZero claims most shooters don’t care about the height difference. I’m throwing all the penalty flags on that play.
Optic height over bore matters.
Optic height over bore does play a role in where your rounds go and constantly changing this will force you to recall such differences every time you try to use your scope’s ballistic drop compensation reticle – unless you don’t really care where the rounds go, but if that’s the case, you didn’t need the ability to zero one scope on two rifles, did you? This matters at distance as well as up close. Have you ever seen someone forget about how high the sights are over the bore on an AR and put a round into a wall or a car? Would you like to see that more often, and by your own hand? Buy this product.
It renders one rifle useless.
Due to the length of the M-Zero Scope Mount, you’ll be unable to mount any other optic on your rail – even a simple iron sight – meaning that unless you want to put an M203 under the barrel and an iron sight on top of the M-Zero for hot high-angle nearly-indirect fire action, your second rifle will be wholly useless until you put a scope back on it, or you literally spray and pray by letting Jesus take the trigger. If you had a super consistent cheek weld, you’d only need the front sight to shoot accurately at close range. Unfortunately, you lost that ability when you bought a product that forced you to shoot with different cheek welds depending on which rifle you pick up. You could take their advice and put BUIS on your handguard, if you want to shoot somewhere other than the place you intend, or put BUIS on the receiver by moving the M-Zero a few slots back, but this would preclude the BUIS from folding and thus prevent the use of many rifle scopes which would need to sit above that area.
It’s the price of a halfway decent optic, or almost so.
I’ve scored plenty of used optic deals in the $200 range, from new budget rifle scopes to used, older premium items. For the cost of this product, or just a little more, you could have a good optic in non-QD scope mounts that won’t let you down. Or you could buy a decent “iron” sight like the Magpul MBUS and use the rest of your cash for ammo. Maybe buy a bunch of spare gun parts that could come in slightly more handy someday. A laser boresighter, if you find zeroing to be that difficult.
I must give the inventor kudos for thinking outside the box on this one; it deviates from the norm, and in a peculiar way this is a breath of fresh air in an industry that essentially perfected the rifle long ago and has since been finding new ways to make it look different and shiny. However, the old adage/meme of a bent fork captioned “Just because you are unique does not mean you are useful” also applies here, and in spades. Zeroing a rifle isn’t hard – certainly not hard enough to spend hundreds of dollars on something with a lot of drawbacks and very few real benefits.