Sig Sauer KILO4K BDX 6x22mm Graphite Laser Rangefinder with Ballistic Data XchangeSig Sauer$599.99
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Sig Sauer
The Sig Sauer KILO3K BDX 6x22mm laser rangefinder in OD Green is a compact, electronically integrated optic built for hunters and long-range shooters who want ballistic solutions without the guesswork. This monocular combines Sig's Lightwave DSP engine—their fastest rangefinding processor—with embedded Applied Ballistics Ultralight (BDX-U) ballistics software and Bluetooth connectivity to pair with BDX-enabled riflescopes. Whether you're glassing from a blind, setting up for a distance shot, or hunting in changing light, the KILO3K delivers range, wind, and elevation data in real time, then syncs that holdover information directly to an illuminated reticle dot on your scope.
The rangefinder operates in five different modes depending on your hunting or shooting situation: Line-Of-Sight (LOS) for simple distance; Angle Modified Range (AMR) for uphill and downhill shots; Applied Ballistics Ultralight (BDX-U) for full ballistic solutions; Applied Ballistics External (BDX-X) for external input; and Archery Mode for bowhunters. A suite of five target modes—First, Best, Last, Fog, and Extended Range—lets you lock onto the exact target you need when multiples are in view or conditions are tough. The onboard temperature, pressure, and humidity sensors continuously measure environmental conditions, feeding those parameters into real-time ballistic calculations so your wind and elevation calls account for actual air density, not just assumptions.
Optically, the 6x22mm monocular delivers a clean, magnified view with SpectraCoat anti-reflection lens coatings for brightness and clarity in sun and low light. The red OLED display is readable in daylight and dusk, and Lumatic display technology automatically adjusts brightness as ambient light changes—no manual fiddling with display controls. HyperScan mode delivers four range updates per second when scanning, while RangeLock locks in the last reliable range when you're tracking distant or difficult targets. The polymer housing is lightweight and compact with an adjustable eyecup and diopter, and it measures distances to one-tenth yard or meter resolution. Download the free SIG BDX smartphone app (iOS and Android) to manage ballistic profiles and settings on your phone, or use the BaseMap app to drop waypoints.
| Magnification | 6x |
| Objective Lens Diameter | 22mm |
| Ballistic Solutions | Applied Ballistics Ultralight (BDX-U), Applied Ballistics External (BDX-X), Line-Of-Sight (LOS), Angle Modified Range (AMR), Archery Mode |
| Drag Curve Support | G1, G7 |
| Target Modes | First, Best, Last, Fog, Extended Range |
| Environmental Sensors | Temperature, Pressure, Humidity |
| Connectivity | Bluetooth (BDX 2.0 compatible) |
| Display Type | Red OLED with Lumatic automatic brightness |
| Range Resolution | 0.1 yards or meters |
| Optics Coating | SpectraCoat multi-coated |
| Housing Material | Polymer |
| Color | OD Green |
| Included Accessories | Eyecup, diopter adjustment |
| Mobile App | Free SIG BDX App (iOS/Android), BaseMap app |
Yes. The KILO3K is BDX 2.0 enabled and communicates via Bluetooth with paired BDX riflescopes, automatically sending windage and elevation solutions to the scope's illuminated holdover dot. No manual input required once they're paired.
Yes. The rangefinder includes a dedicated Archery Mode as one of its five range modes, so bowhunters can get accurate distance and ballistic data.
In Applied Ballistics Ultralight (BDX-U) mode, the KILO3K calculates windage and elevation solutions using its onboard ballistics database (with G1 and G7 drag curve support), real-time environmental sensors, and your stored ballistic profile. Solutions display on the rangefinder's OLED screen in MOA or MILS. You can also download the free SIG BDX smartphone app to manage and refine your ballistic profiles.
The Lightwave DSP engine is Sig's fastest rangefinding processor, and the rangefinder includes an Extended Range target mode for difficult distant targets. HyperScan provides four range updates per second in scan mode, while RangeLock reports the last stable range when ranging far or difficult targets. For exact maximum range specifications, consult Sig Sauer's technical documentation.
Sig Sauer
The Sig Sauer KILO3K BDX 6x22mm laser rangefinder in OD Green is a compact, electronically integrated optic built for hunters and long-range shooters who want ballistic solutions without the guesswork. This monocular combines Sig's Lightwave DSP engine—their fastest rangefinding processor—with embedded Applied Ballistics Ultralight (BDX-U) ballistics software and Bluetooth connectivity to pair with BDX-enabled riflescopes. Whether you're glassing from a blind, setting up for a distance shot, or hunting in changing light, the KILO3K delivers range, wind, and elevation data in real time, then syncs that holdover information directly to an illuminated reticle dot on your scope.
The rangefinder operates in five different modes depending on your hunting or shooting situation: Line-Of-Sight (LOS) for simple distance; Angle Modified Range (AMR) for uphill and downhill shots; Applied Ballistics Ultralight (BDX-U) for full ballistic solutions; Applied Ballistics External (BDX-X) for external input; and Archery Mode for bowhunters. A suite of five target modes—First, Best, Last, Fog, and Extended Range—lets you lock onto the exact target you need when multiples are in view or conditions are tough. The onboard temperature, pressure, and humidity sensors continuously measure environmental conditions, feeding those parameters into real-time ballistic calculations so your wind and elevation calls account for actual air density, not just assumptions.
Optically, the 6x22mm monocular delivers a clean, magnified view with SpectraCoat anti-reflection lens coatings for brightness and clarity in sun and low light. The red OLED display is readable in daylight and dusk, and Lumatic display technology automatically adjusts brightness as ambient light changes—no manual fiddling with display controls. HyperScan mode delivers four range updates per second when scanning, while RangeLock locks in the last reliable range when you're tracking distant or difficult targets. The polymer housing is lightweight and compact with an adjustable eyecup and diopter, and it measures distances to one-tenth yard or meter resolution. Download the free SIG BDX smartphone app (iOS and Android) to manage ballistic profiles and settings on your phone, or use the BaseMap app to drop waypoints.
| Magnification | 6x |
| Objective Lens Diameter | 22mm |
| Ballistic Solutions | Applied Ballistics Ultralight (BDX-U), Applied Ballistics External (BDX-X), Line-Of-Sight (LOS), Angle Modified Range (AMR), Archery Mode |
| Drag Curve Support | G1, G7 |
| Target Modes | First, Best, Last, Fog, Extended Range |
| Environmental Sensors | Temperature, Pressure, Humidity |
| Connectivity | Bluetooth (BDX 2.0 compatible) |
| Display Type | Red OLED with Lumatic automatic brightness |
| Range Resolution | 0.1 yards or meters |
| Optics Coating | SpectraCoat multi-coated |
| Housing Material | Polymer |
| Color | OD Green |
| Included Accessories | Eyecup, diopter adjustment |
| Mobile App | Free SIG BDX App (iOS/Android), BaseMap app |
Yes. The KILO3K is BDX 2.0 enabled and communicates via Bluetooth with paired BDX riflescopes, automatically sending windage and elevation solutions to the scope's illuminated holdover dot. No manual input required once they're paired.
Yes. The rangefinder includes a dedicated Archery Mode as one of its five range modes, so bowhunters can get accurate distance and ballistic data.
In Applied Ballistics Ultralight (BDX-U) mode, the KILO3K calculates windage and elevation solutions using its onboard ballistics database (with G1 and G7 drag curve support), real-time environmental sensors, and your stored ballistic profile. Solutions display on the rangefinder's OLED screen in MOA or MILS. You can also download the free SIG BDX smartphone app to manage and refine your ballistic profiles.
The Lightwave DSP engine is Sig's fastest rangefinding processor, and the rangefinder includes an Extended Range target mode for difficult distant targets. HyperScan provides four range updates per second in scan mode, while RangeLock reports the last stable range when ranging far or difficult targets. For exact maximum range specifications, consult Sig Sauer's technical documentation.
