AGM Rattler V2 25-320 Thermal Rifle Scope

The AGM Rattler V2 25-320 is the refined step-up in Thermal Bros' Rattler V2 thermal rifle scope offering built around AGM's 320—256 thermal sensor with sub-20 mK NETD, a 25 mm F/1.0 germanium objective lens, and the full V2 platform. The 25-320 sits above the entry-tier 19-256 in sensor resolution, sensitivity, magnification, and reach.

NETD is the spec that defines this scope. AGM rates the 25-320 at less than 20 mK at 25°C measurably more sensitive than the 256-tier's <35 mK. Combined with the 320—256 sensor resolution and the 25 mm objective lens, that translates to a refined thermal image and the longer 1,200-yard detection range that the 25-320 carries over the 19-256.

The Rattler V2 lineup at Thermal Bros how the 25-320 fits

Thermal Bros carries two scopes from the AGM Rattler V2 thermal rifle scope family. They're curated as a good/better pair the 19-256 as the accessible entry into the V2 platform, and the 25-320 as the refined step-up for hunters who want better sensor sensitivity, more reach, and tighter on-target framing.

• AGM Rattler V2 19-256 19 mm lens, 256—192 sensor, <35 mK NETD, 2.5— base magnification, 9.3° — 6.9° field of view, 950 yd detection range. The wider-FOV entry option.
• AGM Rattler V2 25-320 25 mm lens, 320—256 sensor, <20 mK NETD, 3.5— base magnification, 7.0° — 5.3° field of view, 1,200 yd detection range. The refined step-up.

The two scopes share the V2 platform 50 Hz refresh rate, 10 reticle options with multiple zeroing profiles, shot-activated video recording with audio, Wi-Fi hotspot, the raised 5-button control layout, the custom ADM QD mount, and the NE-4400 rechargeable battery system. Sensor, lens, NETD, and magnification range are what separate them.

Step up to the 25-320 from the 19-256 when sensor sensitivity matters more the sub-20 mK NETD pulls cleaner thermal contrast than the 256 tier and when longer reach and tighter framing on extended-distance shots is the deciding factor.

Why sub-20 mK NETD matters

NETD (Noise Equivalent Temperature Difference) measures how small a temperature difference the thermal sensor can resolve before electronic noise washes it out. Lower is better. The 25-320 is rated at less than 20 mK at 25°C measurably more sensitive than the 19-256's <35 mK rating.

In practical terms, lower NETD shows up most when conditions get marginal. When a target's body heat sits close to ambient temperature early morning, late afternoon, light rain, fog, or after a hot day when the ground is still radiating warmth better NETD is what separates a clean target image from a less defined thermal signature. The 25-320's sub-20 mK rating holds image clarity further into those marginal conditions than the 256 tier does.

Why the 320—256 sensor is a meaningful step up

The 25-320 carries 81,920 pixels of thermal data 67% more than the 19-256's 49,152 pixels. More pixels collecting thermal data across the same scene means finer resolution and cleaner edge definition on warm bodies against cooler backgrounds.

Combined with the larger 25 mm objective lens which gathers more thermal signal than the 19-256's 19 mm the result is a more usable image at the longer ranges the 25-320 is built for. AGM rates the 25-320's detection range at 1,200 yards on a 6-foot object, compared to the 19-256's 950 yards.

Why the 3.5— base magnification matters

The 25-320 starts at 3.5— base optical magnification and extends to 28— through 8— digital zoom in discrete steps (1—, 2—, 4—, 8—).

A higher base optical magnification means a hunter reaches usable target magnification with less digital zoom multiplication. At 2— digital zoom, the 25-320 sits at 7— effective magnification pulling more native sensor data into the displayed image than a scope with a lower base optical magnification would at the same effective magnification level. AGM positions the 3.5— base as well-suited for hunters working open ground where targets show up at distance.

The trade-off is field of view at base: the 25-320 pulls a 7.0° — 5.3° field, narrower than the 19-256's 9.3° — 6.9°. The 25-320 trades wide scanning capability for reach and tighter on-target framing.

Why the Rattler V2 platform is different

Three things define the Rattler V2 platform on the 25-320:

• Custom ADM QD mount included. The 25-320 ships with the custom ADM QD mount in the box no separate mount purchase required to get the scope on a rifle.
• NE-4400 dual-battery field-swap system. Two NE-4400 rechargeable lithium-ion batteries ship in the box. The battery compartment is built for fast field swaps pull the depleted battery, drop in the charged spare. Over 6.5 hours per battery at 25°C with the Wi-Fi hotspot off.
• Shot-activated recording with audio and multiple zeroing profiles. The V2 line records hunts automatically when the rifle fires, capturing a pre-shot buffer plus post-shot footage with audio. The zeroing profile system lets shooters store separate zeros for different rifles or different loads on the same rifle and switch between them from the menu.

What you get with the Rattler V2 25-320

• 320 — 256 thermal sensor with 12 μm pixel pitch. 67% more pixels than the 19-256's 256—192 sensor finer detail and cleaner edge definition.
• NETD <20 mK (25°C, F#=1.0). Measurably more sensitive than the 256-tier <35 mK holds image quality in marginal conditions.
• 25 mm F/1.0 germanium objective lens. Larger lens than the 19-256 for additional thermal signal gathering.
• 3.5— base magnification, 3.5—–28— total range with 8— max digital zoom (steps of 1—, 2—, 4—, 8—).
• 1,200-yard detection range on a 6-foot object.
• 50 Hz refresh rate for smooth real-time imaging on moving targets.
• 0.39-inch OLED display, 1024 — 768.
• 7.0° — 5.3° angular field of view.
• 10 reticle options in 4 colors with multiple zeroing profiles for different rifles or loads.
• Shot-activated video recording with pre-shot buffer; manual photo, video, and audio recording also supported.
• Stadiametric distance measurement built in.
• Hot Track.
• Wi-Fi hotspot with smartphone streaming and file transfer via the AGM Connect app.
• 16 GB internal EMMC storage for on-device file capture.
• Multiple color palettes: Black Hot, White Hot, Red Hot, Fusion.
• Cold and Warm scene modes to tune the sensor for the environment.
• Flat field correction: Auto, Manual, Semi-Auto.
• Digital boresight adjustment.
• Picture-in-Picture mode and defective pixel correction built in.
• NE-4400 dual-battery field-swap system. Two rechargeable Li-Ion batteries included; over 6.5 hours per battery at 25°C; USB Type-C charging.
• Recoil rated to 1,000 g / 0.4 ms.
• IP67-rated waterproof and dustproof construction.
• Operating temperature range -30°C to +55°C (-22°F to 131°F).
• Custom ADM QD mount included.
• AGM 5-year manufacturer warranty.

Who the Rattler V2 25-320 is built for

• Hunters stepping up from a 256-tier thermal scope who want a refined image, better sensor sensitivity, and longer reach
• Predator and hog hunters working open ground, pasture, and fields where targets show up at extended distances
• Hunters who regularly work in marginal conditions dawn, dusk, fog, light rain where the sub-20 mK NETD earns its price
• Hunters who want longer reach and tighter on-target framing than the 19-256 offers
• Shooters who want a scope with a published recoil rating for centerfire predator and hog applications

The Rattler V2 25-320 is less ideal for hunters whose primary use case is close-range scanning in dense cover where wider field of view matters more than sensor sensitivity and reach, or for buyers using a scope as a primary daytime optic.

Full specifications

• Thermal sensor: 320 — 256, 12 μm pixel pitch
• Sensor architecture: 12 μm VOx uncooled focal plane array
• NETD: <20 mK (25°C, F# = 1.0)
• Objective lens: 25 mm F/1.0 germanium
• Base magnification: 3.5—
• Magnification range: 3.5—–28— (8— max digital zoom; steps of 1—, 2—, 4—, 8—)
• Field of view: 7.0° — 5.3°
• Detection range: up to 1,200 yards (6-foot object)
• Display: 0.39-inch OLED, 1024 — 768
• Refresh rate: 50 Hz
• Eye relief: 45 mm
• Exit pupil: 6 mm
• Diopter range: -5 to +5
• Color palettes: Black Hot, White Hot, Red Hot, Fusion
• Scene modes: Cold, Warm
• Reticles: 10 types, 4 colors, on/off, with multiple zeroing profiles
• Flat field correction: Auto, Manual, Semi-Auto
• Boresight adjustment: digitally controlled
• Distance measurement: stadiametric
• Hot Track: yes
• Picture-in-Picture: yes
• Defective pixel correction: yes
• Wi-Fi hotspot: yes (AGM Connect app)
• Recording: photo, video, audio; shot-activated and manual
• Internal storage: 16 GB EMMC
• Battery system: NE-4400 rechargeable Li-Ion (two included), field-swappable
• Battery life: over 6.5 hours per battery (25°C, WiFi off)
• External power: 5 VDC, 2 A, USB Type-C
• Operating temperature: -30°C to +55°C (-22°F to 131°F)
• Construction: IP67 waterproof and dustproof
• Recoil rating: 1,000 g / 0.4 ms (max.)
• Mount: custom ADM QD mount (included)
• Dimensions: 8.5 — 2.7 — 2.6 in (219 — 68 — 67 mm)
• Weight: 1.08 lb (0.49 kg)
• Warranty: AGM 5-year manufacturer warranty

In the box: thermal rifle scope, ADM QD mount, two NE-4400 rechargeable batteries, battery charger, USB cable, lens cloth, owner's manual, carrying case.

Frequently asked questions

Where does the 25-320 fit in Thermal Bros' Rattler V2 lineup?

Thermal Bros carries two scopes from the AGM Rattler V2 family. The 19-256 is the wider-FOV entry option at the 256 sensor tier. The 25-320 is the refined step-up a 320—256 sensor with sub-20 mK NETD, 25 mm lens, 3.5— base magnification, and 1,200-yard detection range. Step up to the 25-320 when sharper image quality, better sensor sensitivity, and longer reach are the deciding factors.

What's the difference between the 25-320 and the 19-256?

Sensor, lens, NETD, magnification, and reach. The 25-320 uses a 320—256 sensor (67% more pixels than the 19-256's 256—192), is rated at less than 20 mK NETD (more sensitive than the 19-256's <35 mK), runs a 25 mm lens at 3.5— base magnification, and detects to 1,200 yards. The 19-256 uses a 256—192 sensor with <35 mK NETD on a 19 mm lens at 2.5— base, with 950-yard detection. The platform features 50 Hz refresh, ADM QD mount, dual-battery system, shot-activated recording, Wi-Fi hotspot are shared.

Why does NETD matter on this scope?

NETD measures how sensitive the thermal sensor is specifically, the smallest temperature difference it can distinguish before electronic noise washes it out. Lower is better. The 25-320's <20 mK rating is measurably more sensitive than the 19-256's <35 mK. That sensitivity difference shows up most when hunting conditions are marginal fog, light rain, low ambient temperature differences between target and background, dawn, dusk. For hunters who routinely work those conditions, the NETD improvement is one of the most noticeable upgrades over the 256 tier.

How long does the battery last?

Over 6.5 hours per battery at 25°C with the Wi-Fi hotspot off. Two NE-4400 rechargeable batteries ship in the box, and the compartment is built for fast field swaps. The 25-320's runtime per battery is shorter than the 19-256's (which runs up to 11.5 hours per battery) the higher-resolution 320 sensor draws more power than the 256.

Does the 25-320 record video?

Yes. Manual video and audio recording, snapshot capture, and shot-activated recording with a pre-shot buffer are all built in. Files save to 16 GB of internal EMMC storage and can be transferred via USB Type-C or streamed and downloaded over Wi-Fi through the AGM Connect app.

What recoil can the 25-320 handle?

AGM publishes a maximum recoil rating of 1,000 g / 0.4 ms for the 25-320. For magnum centerfire applications, confirm specific caliber compatibility with AGM directly before mounting.

What's the deal with the multiple zeroing profiles?

The Rattler V2 platform stores separate zeros under named profiles. That lets shooters use the same scope across more than one rifle (move the scope between platforms and select the matching profile) or store multiple loads on a single rifle and switch between them in the menu.

What mount comes with the 25-320?

The 25-320 ships with a custom ADM QD (quick-detach) mount in the box.

Is the 25-320 waterproof?

Yes. The scope is IP67-rated sealed against dust ingress and rated for water immersion up to one meter for 30 minutes. Built for rain, snow, and adverse weather conditions in the field.

What's the warranty?

AGM backs the Rattler V2 25-320 with their 5-year manufacturer warranty.