Since 1969

SIG SAUER Electro-Optics
BDX(Ballistic Data Xchange) Rangefinders & Scopes

Sig Sauer Electro-Optics has just transformed hunting...Forever.

SIG SAUER Electro-Optics has just transformed hunting with this unprecedented simple and accurate use of technology - The BDX. These optics utilize your ballistics and Bluetooth® to communicate and illuminate the exact holdover dot on your riflescope reticle.

The KILO BDX rangefinders use your ballistics and Bluetooth® to illuminate the exact holdover dot in SIERRA3BDX riflescopes. For the most accurate and ethical shot, just Connect The Dot™.


First - Download the App (Coming Soon)

Available soon for both Android and Apple devices, the SIG SAUER BDX app allows you to set profiles for your specific setup: this includes location, ammunition and specific equipment.


Download the App For Apple Devices(Coming Soon)


Click Here to Download App For Apple Devices (Coming Soon)


Download the App For Android Devices(Coming Soon)


Click Here to Download App For Android Devices (Coming Soon)


Next - Pair and Range

Featuring SIG SAUERS BDX technology, the KILO BDX is the worlds most advanced laser rangefinder. When paired with a SIERRA3BDX riflescope, the onboard Applied Ballistics Ultralite calculator sends ballistic drop data via Bluetooth directly to the SIERRA3BDXs BDX-R1 reticle, providing an illuminated holdover dot and wind hold. Download the free BDX App for iOS or Android (Coming Soon) to setup ballistic profiles and synchronize custom profiles to your KILO for exact ballistic solutions.


See Our Selection of KILO BDX Rangefinders:


These are just the rangefinders by themselves - they can also be purchased as a Combo Kit with the SIERRA3BDX Riflescopes further down the page below.
KILO1400BDX 6x20mm Rangefinder
KILO1800BDX 6x22mm Rangefinder
KILO2200BDX 7x25mm Rangefinder
KILO2400BDX 7x25mm Rangefinder


Bond and Connect The Dot™

Disguised within the form factor of a traditional riflescope lies the power of the SIG SAUER BDX Ballistic Data Xchange. The SIERRA3BDX riflescope provides the hunter an illuminated auto-holdover dot on targets when coupled with a BDX capable KILO rangefinder. Featuring exceptional SpectraCoat lenses, LevelPlex digital anti-cant, and KinETHIC kinetic energy transfer indicator, the SIERRA3BDX is incredibly simple to use. Range a target, put the holdover dot on target, pull the trigger, impact. SIG SAUERs BDX, just CONNECT THE DOT

See Our Selection of SIERRA3BDX Riflescopes:

These are just the SIERRA3BDX Riflescopes by themselves - they can also be purchased as kits with the Kilo Rangefinders as a Combo Kit further down below.
Sierra3BDX 3.5-10x42mm 30mm
Sierra3BDX 4.5-14x44mm 30mm
Sierra3BDX 4.5-14x50mm 30mm
Sierra3BDX 6.5-20x52mm 30mm

See Our Selection of BDX Combo Kits:

PreOrder the "Perfect Pair" as a Combo Kit - The SIERRA3BDX Riflescope and the Kilo Rangefinder in the configuration to best suit your needs.
Kilo1400BDX LRF & Sierra3BDX Rifle Scope 3.5-10x42mm
Kilo1800BDX LRF & Sierra3BDX Rifle Scope 4.5-14x44mm
Kilo2400BDX LRF & Sierra3BDX Rifle Scope 6.5-20x52mm