Sig Sauer KILO850 Rangefinder Review (SGSOK85401)

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Sig Sauer KILO850 rangefinder
Image Credit - Sig Sauer

Yard Range: 5-1200 yards
Magnification: 4X20 objective lens
Display Type: LCD/Black
Dimensions: 2.9" x 3.9" x 3.9"/5 oz
Waterproof/Fog-proof: No/Unknown
Angle Compensation: Yes
Measuring System: Yards/Meters
Measuring Distance: Line of sight/Slope

Use: Bow Hunting, Rifle Hunting, Target Shooting

The Kilo850 has been discontinued however Sig Sauer have released a new range of BDX rangefinders. These smart new rangefinders are designed to connect to a compatible BDX rifle scope via a Bluetooth app on your mobile phone. Once connected, the BDX system will illuminate the exact holdover dot on the paired rifle scope. Check out the KILO1400BDX rangefinder at Amazon.

Sig Sauer KILO850 Review

What caliber of optics can you expect from "one of the world's most renowned manufacturers of small arms?" In 2015, Sig Sauer decided to enter the sport optics market to complete their production line of firearms, ammo, airguns, and suppressors. Let's find out if they're just as good at making a rangefinder as they are a pistol!

Sig Sauer Rangefinder
Image Credit - Sig Sauer

This unassuming rangefinder has everything you need to get out in the hunt right away. At first glance, it looks just like any other rangefinder, but for its price, it's packing way more than it should.

The compact and very lightweight Kilo850 is your ultimate distance measuring tool. With first and second target modes, angle compensation, and a super-fast engine, you'll have every distance you'll ever need.

The Kilo850 has 4X magnification, 20mm objective lens, and eye relief of 24mm. Your measuring modes available at the tip of your finger are Best, Last, and Hyperscan modes. The Lightwave DSP (Digital Signal Processing) is lightning fast, capable of achieving readings at a quarter of a second. In HyperScan mode, you'll have four updated distances every second. We weren't kidding when we said the Kilo 850 is super fast!

Buyers that use it and test it have given their approval for the Sig Sauer Kilo rangefinder for its reliability, cheap price, and loaded features. It's user-friendly, compact, and works double-time for acquired distances. However, less than a handful of complaints have been aimed towards the glass. Small imperfections in the glass have rendered the unit useless. But, with an included 5 year and unlimited life warranty, there's no risks involved when you buy the Sig way!


  • Price
  • Best/Last Modes
  • HyperScan
  • DSP engine
  • AMR technology


  • Defective units

Sig Sauer KILO850 4X20 Q&A:

What is Sig Sauer AMR Technology?

AMR stands for Angle Modified Range. It's their angle compensation technology with its on-board inclinometer that allows you to acquire distances on an incline or decline. With these corrected distances, you can effectively adjust your rifle scope for bullet holdovers to ensure you hit your target dead-on.

What are Best and Last Target Modes on the Kilo850?

It's uncommon to find a rangefinder with both modes available in this price range. Best target mode is generically known as First Target Mode where it acquires the closest distance to your target by ignoring obstructions and other targets in the distance.

Last Target Mode is generically known as Second Target Mode where it acquires the furthest distance to your target by ignoring foreground obstructions.

What are the Effective Ranging Yardages of the Kilo850 Rangefinder?

Side View of Kilo850
Image Credit - Sig Sauer

Sig Sauer uses their latest generation Field Programmable Gate Array (FPGA) system to effectively acquire positive target acquisition for over a mile, even on weak targets. This system is part of the DSP engine that promises .25 second readings. However, the maximum ranging distance on highly reflective targets is 1,200 yards. Tree ranging is 800 yards, and deer ranging is 600 yards.

Of course, the best measuring results will always depend on ambient conditions. Bright sunlight, rain, fog, and snow can interfere with long distance ranging. However, this is a fact for all rangefinders. Dusk, dawn, and cloud coverage offer the best conditions to get maximum results from your high-performance optic.

What kind of Battery does the Kilo Rangefinder Take?

The Kilo 850 rangefinder requires a single CR2 battery to operate. It has an LCD screen with a black reticle and black display readings. With one battery, you can exceed over 4,000 rangefinder readings. However, heavy use of HyperScan mode can drain battery life quickly since the FPGA system is always active. The battery is included in the purchase, but it's always wise to carry a spare with you especially when heading out to remote locations.

What's in the Box?

Your Sig Sauer Kilo 850 rangefinder also comes with the included CR2 battery, premium padded ballistic nylon case, and a lanyard.

Is the Sig Sauer Kilo850 Rangefinder easy to use?

The Kilo 850 rangefinder has a two button operating system. Depressing the button on the top of the unit is for power mode and ranging. The button on the left side is to select the Modes of your choice. The Kilo was designed for easy operation without buried menus and the need to fiddle-fart around with complex programs. The rangefinder comes automatically preset with Best Target Mode, AMR, and measurements in Yards.

Is the Kilo850 Waterproof?

The Kilo rangefinder hasn't been rated as waterproof, but it is water-resistant. It's fine for continued operation in light rain or drops in puddles, but you should avoid having the unit submerged in water.

What is the Warranty on the Sig Sauer Kilo850?

The rangefinder comes with two impressive warranties that can't be beat. The unit itself is covered with the Infinite Guarantee that provides warranty coverage forever. The second warranty is the Electronic Component Limited 5 Year Warranty that covers any electrical issues arising from "any defects in materials and workmanship in the electronic and Tritium components" in the rangefinder from the date of manufacture.

Noteworthy Features:

  • Super fast readings in .25 seconds
  • Long ranging distance of 1,200 yards
  • User-friendly, compact, and lightweight
  • Latest generation technologies for positive target acquisition
  • Excellent warranty coverage

Our Verdict on the Sig Sauer Kilo850

The aim of it is, the Sig Sauer Kilo850 rangefinder is an excellent buy. It's difficult to compare its value, features, and quality for the price. Sig Sauer did well to add to their firearms line in 2016, and we salute them for their exceptional attention to detail in their optics.

Sig Sauer Kilo 850
Image Credit - Sig Sauer

Because they exceeded our expectations and have won the masses over, you have to check out our #1 rangefinder for under $500, the Sig Sauer Kilo 2000. To upgrade your optic for staggering yardage ranges, high magnification, and your favorite Sig Sauer rangefinder features, it's more than worth the price jump.

But, staying in and under $300 can also get you the best of what there is. The Vortex Ranger 1000 might not have as high yardage ranges as the Kilo 850, but it does have an LED display with angle compensation.

For a time-honored brand that's new to optics, they've certainly given themselves a legitimate foot in the optics market. The Kilo 850 is your affordable and unassuming optic with first-rate performance worthy of taking on a full kilometer of distance!

The Kilo850 has been discontinued however Sig Sauer have released a new range of BDX rangefinders. These smart new rangefinders are designed to connect to a compatible BDX rifle scope via a Bluetooth app on your mobile phone. Once connected, the BDX system will illuminate the exact holdover dot on the paired rifle scope. Check out the KILO1400BDX rangefinder at Amazon.

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