What it is best for

The AGM Rattler TC19-256 is an easy entry into thermal clip-ons: keep your familiar day optic and add thermal in front of it for night work, then remove it for daytime. Best for short-to-medium range, where keeping your existing zero and reticle is important.

Key features and specifications

• 256×192 12-micron high-sensitivity thermal sensor
• 19 mm germanium lens, F1.0
• Detection range up to ~950 yd (~870 m)
• Mounts ahead of day scopes up to 8x; American Defense QD Picatinny mount
• 748×561 OLED display, multiple colour palettes
• 16 GB onboard memory, video and photo recording, Wi-Fi
• Powered by CR123A or rechargeable Li-ion, USB-C external power
• Waterproof and shockproof, 5-year warranty

Trade-offs and who it is not for

A 256-sensor and short 19 mm lens make the Rattler TC35-256 a short-to-medium-range tool; the 384 and 640 Rattler clip-ons reach further with more detail. As a clip-on, it depends on the quality of the day scope behind it.

Pairs well with

• If you want more reach and detail: AGM Rattler TC35-384 Thermal Clip-On
• If you prefer a dedicated thermal scope: AGM Rattler TS19-256 Thermal Riflescope
• If you need a scanner too: Thermal Monoculars

FAQ

• What is a thermal clip-on? It mounts in front of your normal day scope and turns it into a thermal sight, then comes off for daytime use, usually with no change to your zero.
• Do I need to re-zero my rifle? No. A correctly mounted clip-on works through your existing day scope and reticle, so your zero is preserved.
• How far can the TC19-256 detect? Up to around 950 yards on a heat source; practical identification and shooting distances are shorter.

thermal clip-on

clip-on thermal for day scope

entry-level thermal clip-on

thermal attachment for hunting