Video: First Look At SIG Innovative New SIERRA3BDX Scope


Holdover, windage, cant… SIG's new SIERRA3BDX scope accounts for everything but how to get your elk out of the backcountry.

Every so often, a product comes down the line so innovative you can actually feel the ground shift under your feet. The automobile certainly shook terra firma in horse-and-buggy days and in the 21st Century there was tectonic movement with the smartphone. Now, if you’re a shooter, you should feel some pretty notable tremors starting up because SIG Sauer is set to do the same to precision optics, perhaps shooting itself.

Unveiled Friday at the NRA 2018 Annual Meetings and Exhibits in Dallas, the SIERRA3BDX is perhaps the most groundbreaking riflescope to come down the pike since Mil Dot met reticle. With the ability to calculate holdover, cant and — with the right equipment — windage the scope all but erases the margin of error from each and every shot.

It's almost unfair to call it an optic, a “smartscope” seems more fitting. Yet it's as unassuming as your run-of-the-mill glass.  

SIG’s Peter Howell gets into the brass tacks of the SIERRA3BDX in the above video, explaining the ins and outs of the technology. Essentially, it boils down to the scope chatting up your range finder and smartphone to give you the straight dope. 

Bluetootch capable, the scope pairs to iOS and Android smartphones, giving it the ability to download ballistic tables, draw from range-finding data and account for environmental conditions. You simply range with a KILO BDX rangefinder, the SIG BDX app does the thinking and the scope get you on target. All you have to do is hold steady where the illuminated reticle points and your bullet is drops in precisely on target.

The SIERRA3BDX, which goes on sale in July 2018, is innovative not simply for the power it puts in front of shooters’ eyes, but also how it’s constructed. Unlike the big, boxy and heavy rangefinder scopes of the past, SIG's beauty is a lightweight — dang near like any traditional riflescope. Additionally, it’s affordable, Howell pegging it at below $1,200. Plain old first-focal plane scopes can leak into that price range.


Presently, SIG offers the SIERRA3BDX 3.5-10x42mm, 4.5-14x44mm, 4.5-14x50mm, and 6.5-20x52mm. They feature HD glass for superior resolution and optical clarity, 30mm main tubes, side-focus parallax adjustments, and the LevelPlex digital anti-cant system. The BDX-R1 Digital Ballistic Reticle is the evolution of holdover, providing a ballistic solution out to 800 yards with 1 MOA of accuracy

The scope pairs with any of BDX family of rangefinders includes KILO1400BDX, KILO1800BDX, KILO2200BDX, KILO2400BDX, and KILO3000BDX rangefinder binocular. These rangefinders include many of the legacy features that the KILO name was built on Lightwave DSP digital rangefinder engine, Hyperscan with 4 times per second scan rate, RangeLock, and the Lumatic auto-adjusting display.

The SIERRA3BDX should have a lot of appeal to a lot of marksmen — whether hunting or banging distant steel. And like the car change the way we travel and the smartphone the way we communicate, SIG just might have advanced the way we shoot.

For more information on the SIERRA3BDX, please checkout:


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