The best thermal scopes with a rangefinder and ballistic calculator

What a ballistic calculator actually does on a thermal scope

You give it your load: bullet weight, ballistic coefficient, muzzle velocity, sight height, zero distance. It gives you back a correction — usually a moved aiming point on the display, sometimes a dial value — for a given distance. On the scopes here that distance comes from a laser in the same housing, so the sequence is: press a button, get the range, see the hold.

What it is not is magic. The output is only as good as the data you typed in, and the data most people type in is the box velocity for their ammunition rather than a chronographed number from their own rifle. On a 60 yard hog that gap does not matter. At 300 it does.

Note also the distinction between two things sold under the same label. Some of these scopes run the calculation in the optic and move the reticle. Others hand it to a phone app and you read the hold off a screen. In the dark, with a rifle up, those are very different products.

The chain that has to be complete

For this feature to do anything useful, four links all have to be present and published. This is what separates the scopes on this page.

A scope with three of the four is not useless — the Pulsar is an excellent optic — but it is not the product this search is looking for.

Do hog distances actually need this?

Honest answer: usually not, and this page would be dishonest if it did not say so.

Most hogs are shot at a feeder, a trap or a field edge at a distance the shooter already knows because they paced it in daylight. A 100 yard zero on a flat-shooting cartridge covers everything from the muzzle to about 150 yards with a hold on hair. Nothing on this page improves that shot.

Where the chain earns its money is the other kind of night: open pasture, hogs that show up 250 or 300 yards out, and a decision to take or not take a shot that hinges on a number you cannot estimate in a thermal picture. If that is your ground, a scope that ranges and holds is worth real money. If it is not, spend the same money on sensor and battery — our under-$2,000 thermal scope ranking is the better page for you.

How we picked

We took every thermal riflescope in our registry whose maker publishes a ballistic calculator, re-read each spec page and warranty term on September 28, 2026, and ranked on the four links above: laser present and published, calculator on board, profile count, and a published recoil rating. Each is scored on our published thermal rubric — sensor and lens for identifying a hog (30%), usability at night (20%), battery and power (15%), durability (15%), warranty and support (10%) and value within its tier (10%). The full rubric is on how we choose.

We have not tested these scopes, we do not shoot groups, and every figure links to the page it came from.

The picks side by side

The picks in context

1. ATN ThOR 6 Elite LRF 384 3.5-28x

The most complete chain, published end to end, and it stays under $2,000. A built-in 1,000 m laser at ±1 m (905 nm, class 1) feeding a ballistic calculator with six profiles, on a 12 µm 384x288 at ≤15 mK — the lowest published NETD of any scope in our registry — behind a 35 mm germanium F/1.0 lens at 3.5-28x. A 0.49 in OLED at 1920x1080, 64 GB with Recoil Activated Video and Wi-Fi, two 18650s at about nine hours, IP67, a 6000 J recoil rating, an operating range of -22°F to 131°F and a five-year warranty.

Against it: a 3.5x base on a 35 mm lens gives a narrow 7.53° view, which is tight for a sounder inside 75 yards; rings are not included; and only one of the two 18650s is field-replaceable.

2. oneleaf.ai Mars MT1000LRF (35 mm)

The 640 answer, also under $2,000. A 640x512 at 12 µm and <20 mK behind a 35 mm F1.0 lens, a wide 2x base giving 12.5° x 10.1° — much better for finding a sounder than the ATN's 7.5° — a selectable 60/50/30 Hz refresh, a 1024x768 OLED, a built-in laser from 5.5 to 1,300 yd, a ballistic calculator with seven data profiles, IP67, 6000 J, 549 g, Picatinny mount, and optional 50 mm and 75 mm lenses if you later want more reach.

Two costs. Battery is about five hours per removable 18650, so a full night needs spares or USB-C power. And the warranty is three years against ATN's and RIX's five.

3. RIX Storm S6R 640 (35 mm)

The lightest way to carry the full chain: about 1 lb with a Picatinny QD mount included. A 640x512 at <20 mK behind a 35 mm lens, a 2x base with 1-4x digital, a 1024x768 AMOLED, a built-in rangefinder to 1,312 yd at ±1.09 yd, a ballistic calculator, 32 GB with Recoil-Activated Video and Wi-Fi to the RIX+ app, a 1000 g / 6000 J rating and a five-year warranty. It sits above $2,000, and RIX publishes no IP rating for the S6R. Runtime is about four hours per 18650 — the shortest here.

4. Pulsar Thermion 2 LRF XQ50 Pro

The one that fits standard 30 mm rings, which matters if you swap optics between rifles. A 384 at 17 µm and <25 mK behind a 50 mm F/1.0 lens at 3-12x, a 1024x768 AMOLED, a built-in 800 m laser at ±1 m, IPX7, 6000 J on rifled weapons, up to 10 hours on a changeable external pack plus an internal cell, USB-C power delivery, and a warranty reaching five years with registration.

It is fourth for two reasons specific to this page. The ballistics live in Pulsar's Stream Vision Ballistics service rather than running natively in the optic, and the 800 m laser is the shortest here. It is a superb scope; it is not the most complete implementation of this feature.

5. ATN ThOR 5 640

A 640x480 at 12 µm and 60 fps with a ballistic calculator, dual-stream video and Recoil Activated Video, in four lens and magnification options from 2-16x to 5-40x, with detection claims from 2,700 to 3,500 yd. The rangefinder is not in the base model — it is an LRF version — so buying the wrong one leaves you with half the chain. ATN's page for it also omits NETD, lens size, battery life, IP and recoil rating, all of which the newer ThOR 6 publishes, and the warranty runs three or five years depending on model.

6. Athlon Cronus ATS PRO 25P-250

Here to mark the bottom of the category honestly. A 12 µm 256x192 at ≤30 mK behind a 25 mm F1.0 lens at 3.6-14.4x, a 1024x768 OLED, a claimed 10-plus hours with USB-C external power, recoil-triggered Auto-Shot recording, and ballistics through Athlon's phone app — with no laser rangefinder at all, so you are typing a distance you estimated. Athlon's product page also omits refresh rate, IP rating, recoil rating and warranty length. It is a fine budget 256; it is not a ranging ballistic scope.

What to look for in a ranging, calculating thermal scope

1. The laser must be in the scope and published. 1,000 m at ±1 m (ATN), 1,300 yd (oneleaf), 1,312 yd at ±1.09 yd (RIX), 800 m at ±1 m (Pulsar). Athlon has none; the base ThOR 5 has none.
2. On-board calculation, not app-only. Reading a hold off a phone with a rifle shouldered in the dark is not a workflow.
3. Profile count. Six (ATN) or seven (oneleaf) means one per rifle and load, switchable without re-entering data.
4. A published recoil rating. 6000 J appears on the ATN, oneleaf, RIX and Pulsar. It is missing from the Athlon and the base ThOR 5 pages.
5. Base magnification, for finding animals. 2x (oneleaf, RIX) gives a 12.5° view; 3.5x (ATN) gives 7.5°. For a sounder at close range that is the difference between seeing the group and seeing one pig.
6. Battery, because ranging costs power. About 9-10 h (ATN, Pulsar) against about 4-5 h per cell (RIX, oneleaf).
7. Mounting. Pulsar takes standard 30 mm rings; oneleaf and RIX ship Picatinny; ATN's rings are not included.

Setting the profile up so the output means something

• Chronograph your load if you can. Box velocity is an advertisement. A calculator fed a wrong muzzle velocity produces a confident wrong answer.
• Measure your sight height properly. Bore centre to scope centre, with the mount you actually use. On a tall thermal mount this is a bigger number than people expect and it shifts close-range holds.
• Zero first, then build the profile. The calculator works from the zero; get it right with our zeroing guide.
• Verify at one real distance. Shoot the solution at 200 or 300 yards in daylight before you trust it at night. If it disagrees with the paper, the paper is right.
• Build a profile per rifle and load, and label them. Switching in the dark should not involve reading tiny text.
• Range the ground, not the animal. Feeder leg, gate post, trap corner. Those numbers hold still.

Mistakes people make

• Buying the feature for 80 yard shots. The most common one. A 100 yard zero already covers it.
• Buying a non-LRF model expecting the laser. The base ATN ThOR 5 does not have one. Read the model name.
• Trusting box velocity. Garbage in, confident garbage out.
• Treating app ballistics as the same product. A phone in your hand and a rifle up are not compatible.
• Ignoring the recoil rating. A scope with no published rating on a hard-recoiling rifle is an expensive gamble.
• Letting the calculator make the shot decision. It tells you the hold. It does not tell you what is behind the hog.