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Questions & Answers
Sig Sauer SIERRA3BDX 6.5-20x. What size throw lever fits this model scope? Expert Answer

The Switchview Magnification Adjustment Throw Lever at the link below might work for the SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope. Also Sig has a Tango4 throw lever that might also work for this scope. I recommend contacting Sig Sauer to confirm compatibility of their Tango4 throw lever.
https://www.opticsplanet.com/switchview-magnification-adjustment-throw-lever.html?_iv_fit=burris-xtr-ii

by Hunter, Gear Expert, February 17, 2023
Will this stand up to the recoil of a 300 rum with 28 in bull barrel with no muzzle brake? Expert Answer

Yes, the Sig Sauer Sierra3BDX 20x30mm Rifle Scope will hold up to the recoil of a 300 RUM. Just ensure the scope is mount properly and securely to the rifle and there won't be any issues.

by Hunter, Gear Expert, February 3, 2022
Customer Reviews
Helpful Positive Review Superb, awesome scope by borvix, April 20, 2020
I'm very impressed with BDX scopes. Very nice glass, can be used for zeroed distance without electronics, and the electronics are extremely fast, clear and easy to use,, most importantly they are very accurate. The scope is premium quality, very s...
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6/6 found this helpful
Helpful Positive Review Decent-ish by Mario, March 5, 2022
It does want it’s supposed to do and I was honestly surprised with the glass clarity. The reticle is thick and can cover the point of aim and it’s hefty. The system worked fine for me but it’s better to learn hold overs rather than relying on tech IM...
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1/1 found this helpful
Helpful Positive Review Great option if you're willing to embrace the technology by MAK, December 28, 2022
Scopes with the new BDX systems are a great option for those willing to embrace and understand their capabilities. This is the second one I have purchased and I couldn't be more pleased. Low light functionality is exceptional and in my opinion and t...
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1/2 found this helpful
Helpful Positive Review Great scope for beginners by ckwaters, May 2, 2019
Like the other reviewer my Levelplex was off straight out of the box. Sig has a good warranty so I called them and they sent me a prepaid Fedex label and I dropped it off the same day. The next day they received it, fixed the Levelplex and shipped it...
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19/20 found this helpful
Helpful Negative Review levelPlex way off. by Markus Schick, December 27, 2018
out of the box the LevelPlex feature was way off. I started with a bubble level on the turret and turned on the scope and if i used the level indication inside the scope the level was way off. I then hung a plumb bob and checked the crosshairs on t...
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22/35 found this helpful
Most Recent Reviews Cool features, expected glass quality for the price range by Allen, Verified Owner, May 15, 2025
Neat idea and I must confess its not my first BDX scope. Okay, can't be used in my state on game (no "smart" scopes allowed) but I have this on a 17 HMR for varmints and another on a .223 for varmints as well. So far the link to the range finder ha...
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Read All 10 Reviews

We've got an AWESOME deal for you!

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Reticle: BDX-R1 Digital Tube Diameter: 30 mmReticle Focal Plane: Second Focal Plane (SFP) Illumination Color: Red Finish: Matte Color: Black Weight: 25.9 ozAdjustment Click Value: 0.25 MOAAdjustment Type: MOA Illumination Type: LED Included Accessories: Standard Condition: New

Code: SD9-RS-S3BDX52-SOSBDX36111

MPN: SOSBDX36111

UPC: 798681587070

Blazin' Deal
List: $1,109.99Save 42%
$645.99

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Product Info for SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope, 30mm Tube, Second Focal Plane

The Sig Sauer SIERRA3BDX 6.5-20x52mm Tactical Rifle Scope features the revolutionary Ballistic Data Xchange that provides an illuminated ballistic holdover dot when paired with a SIERRA3BDX rangefinder via Bluetooth. These Rifle Scopes by SIG SAUER are designed to meet and exceed all the needs of a serious hunter, with features such as LevelPlex digital anti-cant, KinETHIC kinetic energy transfer indicator, and a motion activated illumination that powers up when it senses motion. The Sig Sauer SIERRA3BDX 6.5-20x52 Ballistic Rifle Scope has superior clarity and light transmission with SpectraCoat anti-reflection lens coatings. Accuracy will bring home that trophy buck, so make sure you're hunting with a Sig Sauer SIERRA3BDX 6.5-20x Illuminated Rifle Scope.image

The world's most advanced rangefinders and Rifle Scopes are now even easier to use with the new BDX 2.0â„¢. BDX 2.0 means you can now choose, App-free easy set-up or if you desire to take your shooting to the next level of accuracy, then download our BDX smartphone app and configure your rangefinder and or rifle scope for your exact ballistics and environmental characteristics. BDX 2.0 also allows users to quickly and easily bond their rangefinders and sights with preset ballistic groups pre-loaded onto all BDX products that cover that vast majority of calibers on the market. These preset ballistic groups allow you to use BDX enabled products without the use of a smartphone app, so they are READY, RIGHT OUT OF THE BOX

WARNING: California`s Proposition 65

Specifications for SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope, 30mm Tube, Second Focal Plane:

Manufacturer: SIG SAUER
Objective Lens Diameter: 52 mm
Magnification: 6.5 - 20 x
Reticle: BDX-R1 Digital
Tube Diameter: 30 mm
Reticle Focal Plane: Second Focal Plane (SFP)
Exit Pupil: 7.5 mm
Illumination Color: Red
Finish: Matte
Field of View, Linear: 4.7 - 14.1 ft at 100 yds
Field of View, Angle: 6.78 degrees
Eye Relief: 3.43 - 4.21 in
Diopter Adjustment Range: -2 - 2 dpt
Color: Black
Weight: 25.9 oz
Adjustment Click Value: 0.25 MOA
Length: 8 in
Adjustment Type: MOA
Parallax: Adjustable
Illumination Type: LED
Battery Type: CR2032
Width: 2 in
Fabric/Material: Glass
Adjustment Range: 1 MOA
Height: 7 in
Focus Range: 800 yds
Lens Material: Glass
Optical Coating: HD Glass
Brightness Settings: 10
Battery Life: 20,000 hours
Operating Temperature: -40 - 140 Fahrenheit
Weather Resistance: Yes
Water Resistance Level: IPX-7
Fogproof: Yes
Battery Quantity: 2
Package Type: Box
Included Accessories: Standard
Magnification Type: Variable
Condition: New
Last Chance: Yes
Minimum Focus Distance: 4 ft
Range Response Time: 0.25 seconds
Attachment Type: Riflescope Ring
Maximum Range: 2800 yds
Minimum Range: 1.5 yds

Features of SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope, 30mm Tube, Second Focal Plane:

  • Integrated BDX Ballistic Data Xchange. A rangefinder and riflescope system that uses ballistics, enviromental conditions and Bluetooth to illuminate the exact holdover dot;
  • Automatic holdover dot on a Digital Focal Plane, combining Second Focal Plane stadias, with an OLED illuminated ballistic holdover dot that automatically scales with zoom to subtend on target at any magnification level;
  • Features our MOTAC (Motion Activated Illumination) that powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced battery life;
  • Spectracoat highly efficient, ultra-wide broadband, anti-reflection lens coatings reduce surface reflections to extremely low levels xacross the entire visible spectrum providing superior light transmission;
  • SIG SAUER's innovative KinETHIC kinetic energy transfer indicator. KinETHIC provides assistance in assuring an ethical hunt by indicating when energy on target drops below a threshold that can be set by the hunter using the SIG BDX App;
  • New for BDX riflescopes, Auto LevelPlex, automatically increases digital level sensitivity on longer shots;
  • Dependable waterproof (IPX-7 rated for complete immersion up to 1 meter) and fog-proof performance

Package Contents:

  • SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope, 30mm Tube, Second Focal Plane
  • Battery
  • Wrench
  • Manual
  • Cloth

SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope, 30mm Tube, Second Focal Plane Orderable Models

List of Orderable Models

SIG SAUER Sierra3BDX Riflescope, 6.5-20x52mm, 30mm Tube, Second Focal Plane, BDX-R1 Digital Reticle, Black, SOSBDX36111 , MPN: SOSBDX36111 , UPC: 798681587070 , Code: SD9-RS-S3BDX52-SOSBDX36111

SIG SAUER Sierra3BDX 6.5-20x52mm Rifle Scope, 30mm Tube, Second Focal Plane Unavailable & Discontinued Models

List of Unorderable Models

Demo, SIG SAUER Sierra3BDX Riflescope, 6.5-20x52mm, 30mm Tube, Second Focal Plane, BDX-R1 Digital Reticle, Black, SOSBDX36111 , MPN: SOSBDX36111-DEMO , Code: SD9-RS-S3BDX52-SOSBDX36111-DEMO
USED, SIG SAUER Sierra3BDX Riflescope, 6.5-20x52mm, 30mm Tube, Second Focal Plane, BDX-R1 Digital Reticle, Black, SOSBDX36111 , MPN: SOSBDX36111-EDEMO , Code: SD9-RS-S3BDX52-SOSBDX36111-EDEMO-RE-B
Open Box, Dealer Demo, SIG SAUER Sierra3BDX Riflescope, 6.5-20x52mm, 30mm Tube, Second Focal Plane, BDX-R1 Digital Reticle, Black, SOSBDX36111 , MPN: SOSBDX36111-DMO , Code: SD9-RS-S3BDX52-SOSBDX36111-DMO
SIG SAUER Sierra3BDX Riflescope, 6.5-20x52mm, 30mm Tube, Second Focal Plane, BDX-R1 Digital Reticle, Black w/ SIG SAUER KILO2400BDX Laser Rangefinder and FREE SIG SAUER Alpha Hunting Riflescope Rings , MPN: SOK24BDX01-KIT1 , Code: SD9-RS-S3BDX52-SOK24BDX01-KIT1
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