5 Best Thermal Scopes for 300 Yards

Are you searching for the best thermal scopes for 300 yards and feeling overwhelmed by how many options are out there? I get it.

The thermal optics market has exploded over the last few years, and sorting through the noise to find a scope that actually performs at that distance takes some serious research. Here is what I know after spending a lot of time behind these optics: 300 yards is a demanding benchmark.

It is far enough that image resolution and detection range matter enormously, but close enough that target acquisition speed is equally important. A scope that stumbles on either of those fronts will cost you opportunities in the field.

In this guide, I have done the heavy lifting for you. I will walk you through my top five picks, cover what makes each one worth your attention, and help you figure out which one belongs on your rifle.

Best Scopes Comparison

Image	Name	Key Features	Check Price
	Pulsar Thermion 2 XP50	640×480 sensor, 50mm lens, 1800m detection range, Wi-Fi, Stream Vision 2 app, IPX7 waterproof	Check Price
	Burris BTS35 v3	400×300 sensor, 35mm lens, 1-8x magnification, video recording, multiple color palettes	Check Price
	SIG Sauer Echo3 1-6x23mm	320×240 sensor, 23mm lens, 1-6x magnification, clip on mount, defense grade build	Check Price
	ATN ThOR 4 1.25-5x	384×288 sensor, recoil activated video, ballistic calculator, Wi-Fi, Bluetooth, 10-18hr battery	Check Price
	ATN ThOR 5	640×480 sensor, Obsidian 5 dual core processor, smooth continuous zoom, ultra low power mode	Check Price

Now that you have a side by side look at the five contenders, it is time to get into the details. Each scope below gets a thorough breakdown so you can see exactly what it brings to the table at 300 yards, where it excels, and whether it fits the way you hunt or shoot. Let us get into it.

1) Pulsar Thermion 2 XP50 (Best Overall Thermal Scope for 300 Yards)

When it comes to stretching a thermal scope out to 300 yards and beyond, the Pulsar Thermion 2 XP50 is the standard that every other option on this list gets measured against. Pulsar has earned a dominant position in the thermal optics market through years of consistent engineering, and the Thermion 2 XP50 is the pinnacle of that work. This is not a scope that simply meets the 300 yard benchmark. It surpasses it with enough performance headroom to make 300 yard shots feel almost routine once you are dialed in.

The sensor is where it all starts. The Thermion 2 XP50 runs a 640×480 thermal sensor with a NETD rating of less than 25mK. NETD, or Noise Equivalent Temperature Difference, is the measurement of how sensitive a thermal sensor is to subtle temperature variations. A lower number means the sensor can detect finer heat signatures, which translates directly into a cleaner, sharper image. At 300 yards, that sensitivity matters because you are no longer dealing with large, obvious heat sources filling the frame. You are identifying relatively small thermal signatures against a complex background, and a high quality sensor makes that identification fast and reliable.

The 50mm germanium lens paired with that sensor gives the Thermion 2 XP50 a rated detection range of 1800 meters, which is far beyond what most shooters will ever need. At 300 yards, you are operating well within the scope’s comfort zone, which means the image you are working with is crisp, detailed, and full of the contrast you need to confirm your target and make a clean shot. The 4x base magnification with up to 16x digital zoom gives you real flexibility. Most 300 yard shots work beautifully between 4x and 8x, leaving plenty of digital headroom if you need to push further.

Connectivity is another area where the Thermion 2 XP50 distinguishes itself. The built in Wi-Fi and Stream Vision 2 app integration let you stream live video to a phone or tablet, record footage, and review your shots in real time. The IPX7 waterproof rating and roughly 8 hours of battery life mean it is ready to perform in real world conditions, not just ideal ones. The traditional riflescope form factor mounts to standard Weaver and Picatinny rails with no adapters, giving you a clean and familiar setup regardless of what platform you are running it on.

Key Features

Sensor Resolution	640×480
NETD Rating	Less than 25mK
Lens	50mm germanium
Detection Range	Up to 1800 meters
Magnification	4x base, up to 16x digital zoom
Battery Life	Approx. 8 hours
Connectivity	Wi-Fi, Stream Vision 2 app
Waterproof Rating	IPX7

Pros

• Sub 25mK NETD sensor produces outstanding image clarity at 300 yards and beyond
• 1800 meter detection range means 300 yard shots are well within the scope’s operational sweet spot
• Traditional riflescope form factor mounts easily on any standard rail system
• Wi-Fi and Stream Vision 2 app integration for live streaming and shot review
• IPX7 waterproofing handles rain and wet conditions without issue
• Up to 8 hours of battery life covers full night sessions comfortably

Cons

• The premium price point is the highest on this list and represents a significant investment that may not suit every budget

The Pulsar Thermion 2 XP50 is in a class of its own for 300 yard thermal performance. If you want a scope that you will never have to second guess when a target steps into range at distance, this is the one. Go check it out and see for yourself why it consistently tops every serious thermal scope list on the market.

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2) Burris BTS35 v3 (Best Mid Range Thermal Scope for 300 Yards)

The Burris BTS35 v3 sits in a compelling position on this list. It is not the most affordable option, and it is not the most expensive, but it might be the most well balanced thermal scope available for hunters and shooters who need reliable 300 yard performance without going all in on a flagship budget. Burris has been building optics in America for over five decades, and the BTS35 v3 is the latest evolution of a thermal platform that has earned genuine respect among serious nighttime hunters.

The scope runs a 400×300 thermal sensor with a 35mm objective lens. That combination is purpose built for the 50 to 400 yard range bracket, which means 300 yards falls squarely in the middle of where this scope operates best. The image is clean and well defined at that distance, with enough contrast between heat signatures and background to support confident target identification and precise shot placement. The 1x to 8x magnification range is one of the most practical designs you will find at this price point. The 1x low end keeps things fast and wide for scanning, and the 8x upper range gives you enough reach to work a target at 300 yards with a clear, usable image.

One of the things I genuinely respect about the BTS35 v3 is how quiet and intuitive it is to operate. The controls are deliberate and produce minimal mechanical feedback, which matters when you are in the field and every sound counts. Feral hogs in particular have sharp hearing, and any electronic noise from your gear can blow a setup you have been working for hours. Burris clearly thought about real world hunting conditions when they designed this scope, not just laboratory specifications.

The multiple color palette options, including white hot, black hot, and a color mode, give you flexibility to adjust your display to match ambient temperature and personal preference. On a warm night, black hot tends to give cleaner contrast on animals. On a cold night, white hot makes heat signatures pop immediately. Having both options in one scope is a practical advantage that adds up over a season. The onboard video recording via micro SD card rounds out a package that is thoughtful, durable, and built to perform where it counts.

Key Features

Sensor Resolution	400×300
Lens	35mm
Magnification	1-8x
Ideal Effective Range	50 to 400 yards
Color Palettes	White hot, black hot, color mode
Video Recording	Micro SD card onboard recording
Operation Design	Quiet field optimized controls

Pros

• 300 yards sits comfortably within the optimized performance range of this scope
• 1x to 8x magnification provides excellent flexibility for scanning and shooting
• Quiet control design prevents spooking wary game during operation
• Multiple color palettes adapt to different temperature conditions in the field
• Onboard micro SD video recording captures every hunt for later review
• Burris American brand reliability backed by a strong warranty

Cons

• The 400×300 sensor resolution falls short of the 640×480 options on this list, which becomes noticeable when pushing to maximum magnification at distance

The Burris BTS35 v3 hits the 300 yard mark with confidence and brings a thoughtful, field tested feature set along with it. If you want a scope that has clearly been designed by people who actually hunt, this one deserves a serious look. Go check it out and see how it fits your setup.

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3) SIG Sauer Echo3 1-6x23mm (Best Clip On Thermal Scope for 300 Yards)

The SIG Sauer Echo3 takes a different path to 300 yard thermal performance than anything else on this list, and for a certain type of shooter, that path makes a lot of sense. Rather than replacing your existing daytime riflescope, the Echo3 is designed to mount in front of it as a clip on thermal sight. The result is a system that preserves your daytime zero, works with the optic you already know and trust, and gives you thermal capability without forcing you to rebuild your entire rifle setup around a new scope. SIG Sauer did not invent the clip on thermal concept, but they built one of the cleaner executions of it available to civilian hunters and shooters.

The Echo3 uses an uncooled VOx microbolometer sensor with a 320×240 resolution and a 23mm lens. That is the most modest sensor specification on this list, and I want to be upfront about that. At 300 yards, the Echo3 will give you a workable thermal image, but it will not match the fine detail and edge sharpness of the higher resolution options. What the Echo3 trades in raw resolution it makes up for in speed and simplicity. The 1x to 6x magnification range with the clip on design means you can acquire a target fast, transition between fields of view naturally, and take a shot with the same feel and ergonomics your rifle had in daylight.

SIG Sauer’s roots in defense and law enforcement manufacturing are evident throughout the Echo3. This scope is built to handle the recoil of heavy caliber rifles, operate in temperature extremes, and shrug off moisture and field abuse. The zero retention design means that when you remove the Echo3 and put it back on, your point of impact stays consistent. For hunters who run the same rifle for both day and night hunting, that is a meaningful advantage that saves time and frustration in the field.

The compact and lightweight form factor is also worth highlighting. The Echo3 does not dramatically change the handling balance of your rifle, which keeps your shooting mechanics natural and consistent. If you are doing vehicle based hunting, moving between multiple stands in one night, or hunting in tight quarters where a large, heavy thermal scope becomes a liability, the Echo3’s compact footprint is a genuine tactical asset. For the 300 yard shooter who values speed and versatility over maximum resolution, this scope earns its place on the list.

Key Features

Sensor Type	Uncooled VOx microbolometer
Sensor Resolution	320×240
Lens	23mm
Magnification	1-6x
Mount Style	Clip on front focal mount
Zero Retention	Daytime zero preserved on removal and reinstall
Build Standard	SIG Sauer defense grade construction

Pros

• Clip on design preserves your existing daytime zero and rifle setup
• SIG Sauer defense grade build handles heavy recoil and harsh field conditions
• Compact and lightweight design keeps rifle handling natural and balanced
• Fast target acquisition at 1x magnification for quick shots
• Versatile day to night transition without rebuilding your entire rifle setup

Cons

• The 320×240 sensor is the lowest resolution on this list and produces noticeably softer images at 300 yards compared to higher resolution options

The SIG Sauer Echo3 is the smart choice for the shooter who wants to add thermal capability to a rifle they already love without starting over. It brings SIG Sauer quality and a genuinely clever design to the 300 yard thermal conversation. Go take a closer look and see if it fits the way you shoot.

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4) ATN ThOR 4 1.25-5x (Best Budget Thermal Scope for 300 Yards)

Getting a capable thermal scope to perform at 300 yards does not have to mean draining your savings, and the ATN ThOR 4 in the 1.25-5x configuration makes that case convincingly. ATN has carved out a strong position in the thermal market by delivering technology forward scopes at prices that are accessible to the average hunter, and the ThOR 4 is the product that put them on the map. It is not perfect, and I will be honest about its limitations, but for the price it commands, it is one of the most genuinely useful thermal scopes available for distance shooting.

The ThOR 4 uses a 384×288 thermal sensor, which is a step above entry level but below the 640×480 options on this list. At 300 yards, that sensor produces an image that is clear enough to identify your target and confirm shot placement, especially when you are running it in good atmospheric conditions with a clean temperature differential between your target and the background. The 1.25x to 5x magnification range works reasonably well at 300 yards, though you will want to use the upper end of that range to get a detailed enough image for precise aiming.

What ATN did with the ThOR 4 that no competitor at this price point has matched is the feature set. The Recoil Activated Video system automatically starts recording the moment you fire, capturing your shots on video without any manual input. The onboard ballistic calculator lets you input your specific ammunition data so the scope adjusts your point of aim at different distances, which is genuinely useful for a hunter who is shooting at 300 yards where a few inches of holdover can matter. Wi-Fi and Bluetooth connectivity with the ATN app turns your phone into a secondary display and remote control, and the GPS track feature logs your hunt locations automatically.

Battery life on the ThOR 4 runs between 10 and 18 hours depending on brightness settings and ambient temperature. On a cold night you will see the lower end of that range, but even so, you are getting more operational time than most competing scopes at any price. The one shot zero feature gets you on paper fast, which is a welcome convenience when you are setting up before last light. For the budget conscious hunter who wants to reach out to 300 yards with thermal, the ThOR 4 delivers more value per dollar than anything else in its class.

Key Features

Sensor Resolution	384×288
Magnification	1.25-5x
Video Recording	Recoil Activated Video (RAV)
Smart Features	Ballistic calculator, one shot zero, GPS track
Connectivity	Wi-Fi, Bluetooth, ATN mobile app
Battery Life	10 to 18 hours depending on conditions

Pros

• Most affordable scope on this list while still covering 300 yard shooting capability
• Recoil Activated Video captures every shot automatically without manual input
• Onboard ballistic calculator is a rare and genuinely useful feature at this price
• Up to 18 hours of battery life outpaces most competitors across all price tiers
• Wi-Fi and Bluetooth connectivity with a full featured mobile app
• One shot zero makes initial setup fast and frustration free

Cons

• The 384×288 sensor produces a softer image at 300 yards compared to the 640×480 options on this list, particularly noticeable when you need fine detail for precise shot placement

The ATN ThOR 4 proves that a tight budget does not have to mean giving up on 300 yard thermal performance. It is loaded with features that punch well above its price tag and delivers reliably in the field when it counts. Go take a look and see just how much scope you can get for the money.

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5) ATN ThOR 5 (Best Entry Level 640 Sensor Thermal Scope for 300 Yards)

The ATN ThOR 5 is what happens when a company takes a proven thermal platform and rebuilds it from the ground up with better technology. ATN took everything that made the ThOR 4 popular and upgraded the two most important components: the sensor and the processor. The result is a scope that bridges the gap between the budget and mid range tiers in a way that makes it genuinely hard to overlook if 300 yard performance is your primary goal and you are not ready to go all the way to a flagship price.

The upgrade to a 640×480 thermal sensor is the headline feature of the ThOR 5, and it makes a real, visible difference at 300 yards. Where the ThOR 4’s 384×288 sensor gives you a functional image, the ThOR 5’s 640 sensor gives you a sharp one. At 300 yards, that difference translates into clearer target identification, better aiming point selection, and greater confidence in your shot. The Obsidian 5 dual core processor that drives the ThOR 5 keeps the image rendering fast and smooth, with minimal latency even during zoom transitions. If you have ever used a thermal scope that produces a stuttering or choppy image when you change magnification, you will immediately appreciate how clean the ThOR 5 operates.

The smooth zoom feature is something ATN specifically engineered for the ThOR 5 generation, and it is one of those things that sounds like a minor upgrade until you actually use it in the field. Rather than stepping between fixed magnification values, the ThOR 5 lets you dial zoom continuously. For a 300 yard shooter who is constantly adjusting magnification based on changing conditions and target behavior, that fluidity keeps you in the picture rather than fumbling through discrete zoom steps.

The ultra low power mode is a practical addition for hunters who run long nights or have limited access to charging in the field. All of the smart features from the ThOR 4 platform carry over, including Recoil Activated Video, the ballistic calculator, Wi-Fi and Bluetooth connectivity, and the ATN app. The one shot zero system makes setup simple and fast. For a hunter who wants to step up into 640 sensor thermal performance without paying flagship prices, the ThOR 5 makes a genuinely compelling case for itself.

Key Features

Sensor Resolution	640×480
Processor	Obsidian 5 dual core
Zoom Type	Smooth continuous zoom
Power Mode	Ultra low power for extended battery life
Video Recording	Recoil Activated Video (RAV)
Smart Features	Ballistic calculator, one shot zero
Connectivity	Wi-Fi, Bluetooth, ATN mobile app

Pros

• 640×480 sensor delivers noticeably sharper and more detailed images at 300 yards versus the ThOR 4
• Obsidian 5 dual core processor provides fast, smooth performance with no noticeable lag
• Continuous smooth zoom eliminates the choppy step magnification found on older platforms
• Ultra low power mode extends operational battery life on long hunts
• Carries the full smart feature set from the proven ThOR 4 platform
• Best entry point into 640 sensor thermal performance without flagship pricing

Cons

• The body is larger and heavier than some competing 640 sensor scopes, which can affect the balance of lightweight rifle builds

The ATN ThOR 5 is the smart step up for any hunter who wants true 640 sensor clarity at 300 yards without the sticker shock of a premium scope. It delivers on its promises in the field and brings a level of image quality that will change the way you hunt at night. Go check it out and see what a real upgrade feels like.

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Conclusion

Shooting accurately at 300 yards with a thermal scope is entirely achievable, but only if you put the right optic on your rifle. The five scopes I covered in this guide represent the strongest options available at every budget level, from an accessible entry point all the way to the flagship tier.

What they all share is the ability to give you a clear, actionable thermal image at that distance when conditions and your technique are dialed in. The differences come down to how much detail you need, how long you need the scope to run, and how much versatility you want from a single piece of gear.

Take stock of how you hunt, what terrain you work, and what your realistic budget looks like. With that in mind, every option on this list is a genuinely capable choice that will improve your 300-yard nighttime performance from the first time you glass up.

See Also: 8 Best Thermal Binoculars {Complete Buying Guide}