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AGM Rattler-C V2 19-256 Thermal Clip-On vs Sig Sauer ECHO CV25 Thermal Scope

The Sig Sauer ECHO CV25 is the stronger clip-on for serious night hunters: its 640x512 sensor resolves far more detail than the AGM's 256x192, and the 25mm lens gives a wider field of view. The AGM Rattler-C V2 19-256 is lighter, runs longer on its included batteries, and is easier to live with on a light rifle. Owners of both praise the quick front-mount conversion; the AGM's lower resolution is the main complaint, while the Sig's weight and single-battery setup draw the most criticism.

  • Choose the AGM Rattler-C V2 19-256 if you want a light, long-running clip-on with two swappable batteries and mostly short-range work.
  • Choose the Sig Sauer ECHO CV25 if image detail and a wider field of view matter more than weight and battery runtime.

Prices

  • AGM Rattler-C V2 19-256 Thermal Clip-On: $895.00 at South Springs Optics (checked today)
  • Sig Sauer ECHO CV25 Thermal Scope: $3,399.00 at eBay (last seen Nov 8)
  • Difference: the AGM Rattler-C V2 19-256 Thermal Clip-On is $2,504.00 cheaper than the Sig Sauer ECHO CV25 Thermal Scope at the latest prices (Nov 8 and Nov 10)
AGM
AGM Rattler-C V2 19-256 Thermal Clip-On Scope 19mm

AGM Rattler-C V2 19-256 Thermal Clip-On

AGM Rattler-C V2 19-256 Thermal Clip-On Scope 19mm

5(2 ratings)
$895.00at South Springs OpticsChecked 5 h ago
See all prices and details
Visit South Springs Optics
Pros
  • Two included batteries and up to 11.5 hours of runtime
  • Light at 1.10 lb
  • IP67 waterproof
  • USB-C power bank support for extended sessions
  • Onboard Wi-Fi, 16 GB storage for video and photos
Cons
  • 256x192 sensor shows less detail at distance
  • Narrower field of view with the 19mm lens
  • Digital zoom gets soft past 4x
Sig Sauer
Sig Sauer ECHO CV25

Sig Sauer ECHO CV25 Thermal Scope

Sig Sauer ECHO CV25

$3,399.00at eBayChecked Nov 8
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • 640x512 sensor gives sharp, detailed images
  • 25mm lens and 17.6-degree field of view suit scanning
  • AMOLED display has strong contrast
  • 50Hz refresh keeps moving targets smooth
Cons
  • Heavier at 18.8 oz
  • Single 18650 battery, about 9 hours
  • No published IP rating or detection range

What separates them

AGM Rattler-C V2 19-256 Thermal Clip-OnSig Sauer ECHO CV25 Thermal Scope
Thermal sensor256x192, 12 micron640x512 VGA, 12 micron
Objective lens19 mm25 mm
Field of viewNarrower, suited to close work17.6 degrees, wider scene
Weight1.10 lb18.8 oz (about 1.18 lb)
BatteryReplaceable NE-4400 Li-Ion, two included, up to 11.5 hoursSingle 18650, about 9 hours
Display1024x768 OLED1024x768 AMOLED
Detection rangeUp to 1000 m/ydNot published by Sig
Weather sealingIP67 ratedNot published by Sig

Price history

$4,427.21$894.70
Nov 9Nov 10
  • AGM Rattler-C V2 19-256 Thermal Clip-On: lowest $894.70 on Nov 9 at Amazon; $895.00 on Nov 10.
  • Sig Sauer ECHO CV25 Thermal Scope: lowest $4,427.21 on Nov 9 at Amazon; $4,427.21 on Nov 10.

Prices at every store

AGM Rattler-C V2 19-256 Thermal Clip-On

  • Night Vision UniverseNew

    In stockReturn policy

    $895.00Checked 5 h ago
    Visit Night Vision Universe
  • Cavanal Outdoor SuppliesNew

    In stockReturn policy

    $895.00Checked 5 h ago
    Visit Cavanal Outdoor Supplies
  • Hogtown OutdoorsNew

    In stockReturn policy

    $895.00Checked 5 h ago
    Visit Hogtown Outdoors
  • South Springs OpticsNew

    In stock

    $895.00Checked 5 h ago
    Visit South Springs Optics
All 7 stores and price history →

Sig Sauer ECHO CV25 Thermal Scope

  • eBayNew

    Availability unknownSold by homeaudio52 (100% positive, 50 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $3,399.00Free shippingChecked Nov 8
    Visit eBay
  • eBayPre-owned

    Availability unknownSold by hs_tech (99.8% positive, 18,900 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $4,099.94Free shippingChecked Nov 8
    Visit eBay
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $4,427.21Free shippingChecked 5 h ago
    Visit Amazon
  • Tractor Supply CoNew

    Availability unknown

    $4,499.99Free shippingChecked 5 h ago
    Visit Tractor Supply Co

Store links may earn us a commission. Some prices via Klarna.

All 3 stores and price history →

Specs compared

SpecAGM Rattler-C V2 19-256 Thermal Clip-OnSig Sauer ECHO CV25 Thermal Scope
Display Resolution1024×768 OLED1024x768 AMOLED
Battery TypeOne replaceable rechargeable NE-4400 Li-Ion bat…18650
Weight1.10 lb18.8 ounces
Refresh Rate50 Hz50Hz
Battery LifeUp to 11.5 hours—
Thermal Resolution256×192—
Lens Size19 mm—
Base Magnification1×—
Digital Magnification Range1× - 8×—
Detection Range1000 m/yd—
Video/Photo Storage16 GB—
Waterproof RatingIP67—
Show all 21 specsShow fewer specs
SpecAGM Rattler-C V2 19-256 Thermal Clip-OnSig Sauer ECHO CV25 Thermal Scope
Color—Black
Thermal Sensor Resolution—640x512 VGA
Pixel Pitch—12um
Thermal Sensitivity—≤20mK
Magnification Range—1x - 8x
Objective Diameter—25mm
Field of View—17.6°
Battery Runtime—9-hour runtime
Length—4.96"

What reviewers say

AGM Rattler-C V2 19-256 Thermal Clip-On

Owner feedback on the Rattler-C V2 line is generally positive on image quality for the price and on the convenience of clipping on to a day scope. The 256 model draws the most complaints about resolution and detail at distance.

What people mention
  • Image qualityPraisedOwners say the sub-20mK sensor gives a clear picture in darkness, fog and light cover.
  • ResolutionCriticisedThe 256×192 sensor shows less detail than the 384 and 640 versions, especially at range.
  • MountingMixedClipping on in front of a day scope is quick, but owners say zero should be re-checked after fitting.
  • BatteryPraisedUsers like the replaceable battery, the second included cell and USB-C power bank support.

Sig Sauer ECHO CV25 Thermal Scope

Owners of Sig Sauer thermal clip-ons generally praise the image quality and the compact build, and the CV25's VGA sensor is a step up from older 384-resolution units. Complaints tend to center on the 1x base magnification and the need to pair it with a suitable day scope.

What people mention
  • Image qualityPraisedOwners say the VGA sensor and AMOLED display give a detailed thermal picture.
  • Size and weightPraisedUsers like that it is short and light enough to carry and mount easily.
  • Battery lifePraisedThe 18650 battery is reported to last through long nights.
  • MagnificationCriticisedThe 1x base magnification is seen as limiting for longer shots.

Questions and answers

Which is better for spotting game at long range?
The Sig ECHO CV25. Its 640x512 sensor and 25mm lens resolve more detail, so you can identify animals farther out. The AGM's 256x192 sensor is better suited to closer work.
Which one lasts longer in the field?
The AGM. It ships with two replaceable NE-4400 batteries and runs up to 11.5 hours, and you can top it up from a USB-C power bank. The Sig runs about 9 hours on one 18650.
Is the Sig worth stepping up to over the AGM?
If image quality is your priority, yes. The jump from 256x192 to 640x512 is the biggest difference between them. If weight and battery life matter more, stay with the AGM.
Which is easier to mount in front of a day scope?
Both mount in front of a day optic without special tools. The AGM is lighter, which puts less strain on the front of a scope and rail.
Which handles rain and snow better?
The AGM carries an IP67 waterproof rating. Sig does not publish a rating for the ECHO CV25, so the AGM is the safer bet in wet weather.
Do both record video?
The AGM records video and photos to 16 GB of internal storage and streams over Wi-Fi. The Sig's recording features are not as clearly documented, so check before you rely on it.

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