ATN TICO 6 review: which of the three thermal clip-ons fits your scope
Our verdict: 4.0/5. The ATN TICO 6 is a 1x thermal clip-on: it mounts in front of the day scope you already own, so you keep your reticle and aim through your own glass at night. It comes in three versions, and the right one depends on your day scope. ATN pairs the 256x192 / 25 mm model reviewed here with day scopes of 1-8x, the 384x288 / 35 mm with 1-12x and the 640x512 / 50 mm with 1-15x. All three run at 50 Hz, record video, stream over WiFi and carry ATN's 5-year warranty. The trade-offs: the eyepiece for handheld use is sold separately, rifles without a forward rail need an add-on mount, and the owner record is short, 20 reviews across the three listings, almost all five stars. Prefer a standalone thermal scope with its own reticle? See our best thermal scopes.
OpticsPlanet shoppers rate the 1x25 256 at 4.9/5 from 8 reviews. It runs around $1,000. The 1x35 384 runs around $1,800 and the 1x50 640 around $3,000. Check price and availability on OpticsPlanet; confirm the current price on the retailer page.
How we reviewed it: a research-based review built from the three OpticsPlanet listings and specification tables, ATN's own product page for each version and the TICO 6 manual, and every owner review on the three listings, including the one critical review. We have not field-tested these units ourselves; the score is our editorial opinion and owner ratings are shown attributed to their source. See how we evaluate.
What the TICO 6 is, and why the titles say 1-8x
A thermal clip-on is not a scope. It has no reticle: it sits in front of your day scope's objective and shows the day scope a thermal picture, so you keep aiming with the reticle you already know. ATN lists an optical magnification of 1x for every TICO 6. The "1-8x", "1-12x" and "1-15x" in the retailer's titles are not zoom ranges of the clip-on; they match what ATN calls the optimal day scope magnification for each version. Your day scope does all of the magnifying.
The three versions share a 12 micron VOx sensor family, a 50 Hz refresh rate, F/1.0 germanium lenses, IP67 sealing and the same 6000 Joules recoil rating, according to ATN, and the retailer tables list a magnesium alloy body for all three. They differ in sensor, lens, display and size:
| Version (MPN) | Sensor / lens | NETD | Display | Field of view | Detection range | Day scope match | Weight | OpticsPlanet rating |
|---|---|---|---|---|---|---|---|---|
| 1x25 256 (TICO6225A), reviewed here | 256x192 / 25 mm | 20 mK or less | 0.32 in OLED, 800x600 | 7.0 x 5.3 degrees | 1,500 m | 1-8x | 1.12 lb | 4.9 from 8 reviews |
| 1x35 384 (TICO6335A) | 384x288 / 35 mm | 18 mK or less | 0.49 in OLED, 1920x1080 | 7.5 x 5.7 degrees | 2,710 m | 1-12x | 1.15 lb | 5.0 from 6 reviews |
| 1x50 640 (TICO6650A) | 640x512 / 50 mm | 18 mK or less | 0.49 in OLED, 1920x1080 | 8.8 x 7.0 degrees | 3,500 m | 1-15x | 1.24 lb | 4.7 from 6 reviews |
Specifications from ATN's product page for each version; ratings from each OpticsPlanet listing. Treat the detection ranges as the distance at which a heat signature shows up on screen; telling a coyote from a dog happens much closer.
ATN's video introducing the TICO 6 thermal clip-on line: mounting in front of a day scope, the three sensor resolutions (256x192, 384x288, 640x512) and recoil-activated video that saves 10 seconds before and 5 seconds after a shot. It covers the whole line, not the 256 model alone; the 18 mK figure on screen is shown beside the 640x512 and 384x288 units only.
What you get: a smart clip-on, not a bare thermal core
All three listings carry the same feature list: ATN's SharpIR image enhancement, Hot Point Tracking to mark the warmest object in view, several color palettes, onboard video and audio recording with Recoil Activated Video, 64 GB of internal memory, a built-in WiFi hotspot for streaming and a tactical remote control. ATN's 256 page names six palettes (White Hot, Black Hot, Iron Red, Alarm, Green Hot and Sepia) and lists the box contents: lens tissue, cable, manual, battery charger, 2 batteries, heating target, portable bag, rubber adapter, remote control, mount, adhesive tape and wrench. ATN's manual adds one caveat on recording: Recoil Activated Video may not trigger with low-recoil calibers or when using suppressors.
Zeroing is done in software. The manual describes shifting the thermal image along the X and Y axes to line it up with your day scope's reticle, and a Freeze Frame mode that locks the image after a shot so you can adjust without the target moving. One four-star reviewer on the 1x25 listing, J (SC), writes:
“Easy swap between guns makes this optic great for multiple purposes.”
J (SC), reviewer, TICO 6 1x25, via OpticsPlanet
Another 1x25 reviewer, Daniel P. (TX), likes pairing it with an existing optic “without having to re-zero constantly”, and on the 1x35 listing Brandon K. (GA) says it “holds zero alignment well with minimal adjustment needed”. Four of the eight 1x25 reviewers call it lightweight; ATN lists 1.12 lb. Two of the eight praise customer service.
The honest catch: extra parts, batteries and a short owner record
Handheld use costs extra. ATN's product pages list the eyepiece that turns the clip-on into a thermal monocular as an optional accessory, and the TICO 6 manual marks the eyepiece as not included in the box. J (SC) puts it bluntly: “My biggest complaint is the eyepiece for handheld use being sold separately”. One reviewer on the 1x50 listing writes “The monocular eyepiece is blurry with no means to adjust the focus”.
Mounting depends on your rifle. ATN includes a quick-detach mount; its Scope Mounting System is an add-on. ATN's manual describes the included mount securing to the rifle rail with a quick-release lever. If your rifle has no forward rail, budget for an adapter and check it against your scope's objective bell. The same 1x50 reviewer bought 44 mm and 50 mm scope adapters and says “neither one fits any of the 44mm or 50mm day optics that I have”.
Plan on battery swaps. ATN rates about 8 hours, 4 hours per battery, with two 18650 batteries in the box, and the manual describes a single removable 18650 in the unit. That 1x50 reviewer also says “the battery life is no where near what they advertise”.
The owner record is short. The three listings hold 20 reviews: 18 five-star, one four-star and one three-star, every one dated 2026. The only critical review is that three-star on the 1x50 640 listing, whose author writes “I bought this item right from ATN” and still writes “the thermal unit itself is pretty good”; the complaints are about the eyepiece, the adapters, ATN's customer service and battery life. On the 1x25 listing one of the eight reviews carries a Verified Owner tag; none on the 1x35 or 1x50 listings do. There is no long-term durability record yet.
Trade-offs, plainly
- The 256 model's 256x192 sensor and 800x600 display are the entry tier; ATN's optimal day scope match for it is 1-8x.
- The handheld eyepiece is sold separately, and one 1x50 reviewer found theirs blurry with no way to adjust the focus.
- Rifles without a forward Picatinny rail need ATN's add-on Scope Mounting System or an adapter; one reviewer's adapters did not fit their scopes.
- About 4 hours per battery by ATN's rating, so long sits mean carrying charged 18650s; one reviewer says real runtime falls short.
- Recoil Activated Video may not trigger with low-recoil calibers or suppressors, per ATN's manual.
- Twenty reviews across three listings, nearly all five stars and all from 2026: too few and too new to show a durability pattern.
Key specifications (TICO 6 1x25, 256x192)
| Model | ATN TICO 6 1x25mm, 256x192, black, MPN TICO6225A |
|---|---|
| Type | Thermal clip-on, mounts in front of a day scope |
| Sensor | 256x192, 12 micron VOx uncooled (ATN) |
| Thermal sensitivity (NETD) | 20 mK or less (ATN) |
| Refresh rate | 50 Hz (ATN) |
| Lens | 25 mm germanium, F/1.0 (ATN) |
| Optical magnification | 1x (ATN) |
| Optimal day scope magnification | 1-8x (ATN) |
| Field of view | 7.0 x 5.3 degrees (ATN) |
| Detection range | 1,500 m (ATN; detection of a heat signature, not identification) |
| Display | 0.32 inch OLED, 800x600 (ATN) |
| Battery | 18650 rechargeable, 2 included; about 8 hours, 4 hours per battery (ATN) |
| Max recoil rating | 6000 Joules / 1000g acceleration over 0.4 ms (ATN) |
| Sealing | IP67 (ATN) |
| Working temperature | -22 to 131 F / -30 to +55 C (ATN) |
| Weight | 511 g / 1.12 lb (ATN) |
| Dimensions | 6.25 x 3.34 x 2.91 in (ATN) |
| Housing | Magnesium alloy (ATN) |
| Mounting | Quick Detach (included) / Scope Mounting System (add-on) (ATN) |
| Warranty | 5 years from the original date of purchase (ATN manual) |
Marked (ATN) from ATN's TICO 6 256 product page, (ATN manual) from the TICO 6 manual. The OpticsPlanet table for this listing gives the same weight, sealing, NETD, refresh rate and temperature range. ATN's pages state the TICO 6 is subject to U.S. export control laws, and OpticsPlanet marks the 1x25 listing as an ITAR product.
Which configuration should you buy?
TICO 6 1x25 256x192 (TICO6225A): for low-power scopes
The version reviewed above: the 256x192 sensor behind a 25 mm lens, the 0.32 inch 800x600 display and the lightest body of the three at 1.12 lb. ATN matches it to day scopes of 1-8x, such as a low-power variable optic. Its 7.0 x 5.3 degree field of view is the narrowest of the three. Reviewers rate it 4.9/5 across 8 OpticsPlanet reviews, seven of them five stars; the four-star review is J's eyepiece complaint, and one reviewer lists “Size (nitpicking)” as a con. It runs around $1,000.
TICO 6 1x35 384x288 (TICO6335A): the middle step
A 384x288 sensor behind a 35 mm lens, with ATN's 18 mK sensitivity rating and the 0.49 inch 1920x1080 display. ATN matches it to day scopes of 1-12x and rates detection at 2,710 m; the field of view is 7.5 x 5.7 degrees and the weight 1.15 lb. Reviewers rate it 5.0/5 across 6 OpticsPlanet reviews, all five stars and none tagged as a Verified Owner, so there is no weakness on record yet. It runs around $1,800.
TICO 6 1x50 640x512 (TICO6650A): for higher-power scopes
The 640x512 sensor behind a 50 mm lens, the same 18 mK rating and 1920x1080 display as the 384, and ATN's longest detection rating of the three, 3,500 m. ATN matches it to day scopes of 1-15x. It is the heaviest at 1.24 lb and, at 6.88 in long per ATN, the longest. Reviewers rate it 4.7/5 across 6 OpticsPlanet reviews: five five-star reviews and the three-star review described above, from a buyer who purchased from ATN. One five-star reviewer, William H. (VT), says “It mounts cleanly as a clip-on or handheld monocular”. It runs around $3,000.
What else to consider
- Comparing clip-ons? Our best clip-on thermal guide sets the TICO 6 against the SIG SAUER ECHO CV25.
- Want a dedicated thermal scope instead? See our ATN Thor 5 review and the best thermal scope guide.
- Hunting coyotes? Read best thermal scope for coyote hunting.
- Only want to scan? A handheld unit may suit you better; see best thermal monoculars.
- Thermal or night vision? Read thermal vs night vision.
FAQ
Does the ATN TICO 6 magnify the image?
No. ATN lists an optical magnification of 1x for all three versions. The clip-on sits in front of your day scope and the day scope does all the magnifying. The 1-8x, 1-12x and 1-15x figures in the retailer listing titles match what ATN calls the optimal day scope magnification for the 256, 384 and 640 versions.
Which TICO 6 should I buy: 256, 384 or 640?
Match it to your day scope first. ATN pairs the 256x192 with 25 mm lens with day scopes of 1-8x, the 384x288 with 35 mm lens with 1-12x, and the 640x512 with 50 mm lens with 1-15x. The 256 has a 0.32 inch 800x600 display and a sensitivity rating of 20 mK or less; the 384 and 640 have a 0.49 inch 1920x1080 display and a rating of 18 mK or less. ATN rates detection at 1,500 m, 2,710 m and 3,500 m. The 256 is the cheapest of the three and the 640 the most expensive.
Can I use the TICO 6 as a handheld thermal monocular?
Only with an extra part. ATN's product pages list the eyepiece that turns the clip-on into a thermal monocular as an optional accessory, and the TICO 6 manual marks the eyepiece as not included in the box. One reviewer on the 1x25 listing calls the separate eyepiece their biggest complaint, and one reviewer on the 1x50 listing found theirs blurry with no way to adjust the focus.
How long does the TICO 6 battery last?
ATN rates all three versions at about 8 hours, 4 hours per battery, with two 18650 rechargeable batteries in the box. The manual describes a single removable 18650 in the unit, so plan on swapping batteries during a long night. One reviewer on the 1x50 listing says the battery life is well short of what ATN advertises.
How do you zero the TICO 6 to your day scope?
The TICO 6 has no reticle of its own: you aim with your day scope. ATN's manual describes moving the thermal image along the X and Y axes to line it up with the reticle of the rifle scope, and a Freeze Frame mode that locks the image after a shot so you can adjust without the target moving. Confirm the alignment at the range after every new mounting.
What warranty does the ATN TICO 6 have?
ATN's TICO 6 manual warrants the product to be free from defects in materials and workmanship under normal use for five years from the original date of purchase, and ATN's product pages list a 5-year warranty for all three versions. Read the terms in the manual before you buy.
More: best clip-on thermal · best thermal scopes · best thermal monoculars · thermal vs night vision.