Try It: Ammunition To Go Launches a Free Custom Rifle Zeroing Tool for ARs

Setting up your AR properly and getting it zero’d is probably one of the more important jobs you have to do after buying both your rifle, optic or irons. While most of us — myself included — have been content with common “battle zero” distances, Paul Ivnitskiy of Ammo to Go says most shooters are using zeros they were simply handed rather than ones truly matched to their rifle.

Generic battle zeros or 100-yard zeros may be fine for many general setups, but they often fall short once barrel length, muzzle velocity, and optic height are taken into account.

In his full article, posted with his permission below, and in the video referenced above, Paul says a proper zero is the distance at which the bullet’s trajectory stays inside an acceptable vital zone across the widest possible range of distances, what ballisticians call maximum point blank range, or MPBR. Applying the wrong conventional zero to a specific rifle can collapse that MPBR, force extra holds, and even create safety concerns when the bullet arcs higher than expected beyond the target.

Ammunition To Go has built a free online Zero Tool that solves the problem. It asks for your exact barrel length, caliber, optic type, and height, plus desired vital zone, then calculates the mathematically optimal zero for your setup.

The goal is simple: aim center, hit center, with no extra mental math or guesswork.

The tool is available now at no cost at ammunitiontogo.com/zero-tool. Hunters and shooters are encouraged to run their specific configuration, confirm the recommended zero at the range, and gain the confidence that comes from data instead of guesswork.

For hunters especially, dialing in the right zero can mean fewer missed opportunities in the field and cleaner, more ethical harvests because the bullet stays reliably inside the vital zone at the distances at which they actually hunt.

You Think You Zeroed Your Rifle. You Really Just Guessed.

By Paul Ivnitskiy | Ammunition To Go

Walk up to any shooter at your local range and ask them two questions: 

What is the purpose of your zero, and why did you choose that distance? In our experience, most can’t answer either. Not because they’re bad shooters — but because nobody has ever cleanly articulated it to them.

Someone handed them a blanket recommendation and they never questioned it.

“Just use a 36-yard zero, it’s a great all around zero.” We’ve all heard it — swap out the distance and you’ve heard it a hundred times. 25 meters. 50 yards. 100 yards. Every instructor, every forum post, every range buddy has a number and a confident explanation to go with it. But for what setup? Based on what data? A 36-yard zero on the wrong rifle configuration can collapse your maximum point blank range to double digit distances and force multiple elevation holds at every common engagement distance. That’s not an all around zero. That’s a liability masquerading as advice.

The Variables Nobody Talks About

The deeper issue is that most shooters don’t understand how barrel length, muzzle velocity, caliber, optic height, and optic type interact to determine where their bullet actually goes. These are not interchangeable variables. They are your specific system, and changing any one of them changes your ballistics.

A 10.5-inch SBR with a Unity Riser and a red dot is a fundamentally different ballistic system than a 16-inch carbine with a 1.5-inch mount and a ballistically calibrated ACOG. Running the same zero on both is like running the same tire pressure on a sports car and a pickup truck and wondering why one handles poorly.

Your optic height alone has a dramatic effect on trajectory. The taller your mount, the steeper the launch angle required to achieve zero at a given distance — which means a higher arc, a higher peak, and a bullet that spends more of its flight path above your point of aim than you realize.

What a Zero Actually Is

Here is the definition that nobody seems to state plainly:

A zero is the distance at which you have configured your rifle so that your bullet’s trajectory stays within an acceptable hit zone across the widest possible range of distances.

That’s it. Everything else flows from that definition. The goal of a zero isn’t simply to make your rifle hit where you aim at one specific distance. The goal is to maximize the range over which a center hold produces a center hit — what ballisticians call maximum point blank range, or MPBR.

Blindly applying the wrong conventional zero to your specific setup forces you to memorize multiple elevation holds and collapses your MPBR. At that point you’ve lost the ability to aim center and hit center at any common engagement distance beyond conversational range. 

This Is Also a Safety Issue

A bad zero doesn’t just hurt your performance. It creates a safety problem that the shooting community doesn’t discuss often enough.

Every range has the same rule — know what’s beyond your target. But bullets don’t fly in a straight line. Depending on your rifle and selected zero, you could produce a heavily arced trajectory which means your round could be traveling several inches, if not a foot higher than your point of aim at distances you never considered or accounted for.

This is why we hear about stray rounds crossing property lines, traveling into neighboring zip codes, and hitting innocent bystanders. It isn’t always because of recklessness. Sometimes it’s because a shooter who genuinely believed they knew where their bullet was going — and simply had no idea.

If you can’t account for what your bullet is doing from the muzzle out past your target at every distance, you aren’t running a calculated zero. You are running a hail Mary.

The Solution

We built the Ammunition To Go Zero Tool to solve this problem. It takes your specific inputs — barrel length, caliber, optic type, optic height, and vital zone — and calculates the mathematically optimal zero for your exact configuration. The result is the flattest possible trajectory within your defined vital zone, extended out to your true MPBR.

Aim center. Hit center. No holds. No mental math. No guessing.

A rifle paired with an optimal zero is lethal in the hands of an average shooter. Not because of the gear. Because that shooter knows exactly what their bullet does and where it goes at every distance. That knowledge is the force multiplier.

Training still matters. It always will. But it starts with knowing your zero.

Find your optimal zero free at ammunitiontogo.com/zero-tool.