SIG BDX

SIG BDX

SIG Ballistic Data Xchange

65 ratings
41 reviews
Free

Details

  • Released
  • Updated
  • August 5, 2018
  • July 1, 2026

Features

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About

This application connects a rangefinder to a riflescope, displaying an illuminated holdover dot for precise aiming. It facilitates syncing devices and provides ballistic data for accurate shots up to 800 yards.

Sync rangefinder with riflescope
Display illuminated holdover dot
Measure target distance
Ballistic data integration
Connect The Dot™ system
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What's New in SIG BDX

462

July 1, 2026

- Fix for the Profile Editor page when using a Bravo6

User reviews

Time not synching on Echo MV50

Time is off by about 13 hours on the monocular and the only way to sync it is through the app. Called customer service and was told they’re aware and engineers are working on it and just wait for a possible update with no time frame. Not sure why it can’t be fixed for such an expensive piece of equipment.
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Currently no bugs for me

Right now the App is awesome to use. I pair it with some HDX Kilo6K binoculars and have not had an issue for a while. Initially the app had to be synced with my binoculars for the binoculars to get the correct temperature or else it would default to -18°C and that could throw my shot off by one or two tenths of a MIL. The app updated my binoculars just fine and I have not seen the -18° glitch since 🙏🤞 and it’s been over six months.

I do wish I could plug in values on the ballistics page without needing to be Bluetooth connected to a device.
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300 PRC

I love the combo and have no issues at all. Only wish there was more options for ballistics instead of having to enter in the caliber and all the info. I mainly use a 300 PRC and 450 BM.

Time not synching on Echo MV50

Time is off by about 13 hours on the monocular and the only way to sync it is through the app. Called customer service and was told they’re aware and engineers are working on it and just wait for a possible update with no time frame. Not sure why it can’t be fixed for such an expensive piece of equipment.
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It’s ok

Seams to be a bit female as sometimes it works well other times not at all frustrating come on it guys please sort it out cheers

Developer apps

FAQ

What does the SIG BDX app do?

The SIG BDX app connects your KILO BDX rangefinder to your SIERRA3BDX riflescope. It allows you to sync these devices and then displays an illuminated holdover dot directly in your riflescope, indicating the precise aiming point for your target.

How does the 'Connect The Dot™' feature work?

Once your rangefinder and riflescope are synced and paired, you simply press the RANGE button on your rangefinder to measure the distance to your target. The app then transmits this data, and the riflescope's reticle will illuminate the exact holdover dot needed for an accurate shot, up to 800 yards.

Is there a cost to use the SIG BDX app?

Based on the provided information, the SIG BDX app is available for free. There are no mentioned costs associated with downloading or using its core functionalities.

What is the accuracy and range of the BDX system?

The BDX system, when used with a paired KILO BDX rangefinder and SIERRA3BDX riflescope, offers 1 MOA of accuracy out to 800 yards. The riflescope's power selector ring will show a solid blue LED when actively paired and flash when a new holdover reticle update is received.

What devices are compatible with the SIG BDX app?

The SIG BDX app is designed to work with SIG KILO BDX rangefinders and SIERRA3BDX riflescopes. It facilitates the bonding process between these specific devices to enable the illuminated holdover dot feature.