Enjoy free shipping during the holidays! Shop now and get
Free Value Shipping
on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.
Enjoy Our Extended FREE RETURNS
We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended
Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended
return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later).
We'll even cover the cost of return shipping. Learn more about our
Return Policy.
Please Enable Your Browser's Cookies Functionality
Cookies are not currently enabled in your browser, and due to this the functionality of our site will be severely restricted.
Web browser based cookies allow us to customize our site for you, save items in your cart,
and provide you with a great experience when shopping OpticsPlanet.
Your privacy is important to us, and any personal information you supply to us is kept strictly confidential.
If you cannot enable cookies in your browser, please contact us — we are always here to help!
JavaScript is blocked by AdBlocker or ScriptBlocker
We're sorry - it looks like some elements of OpticsPlanet are being disabled by your AdBlocker.
Unfortunately we are unable to offer our excellent shopping experience without JavaScript.
Please add "opticsplanet.com" and "https://opl.0ps.us/assets-b6e0d4a67bc/" to whitelist,
or disable AdBlocker for this site (please note that we do NOT feature any annoying ads on this website).
Thanks!
Your Browser is Outdated
Unfortunately, we are unable to provide an excellent shopping experience on your browser because it lacks modern functionality needed for us
to provide a fast, secure, and enjoyable experience. If you cannot upgrade your browser or use an alternative device to visit us,
please contact us at +1-800-504-5897 and we'll be happy to assist you over the phone!
SIG SAUER Sierra3BDX 2.5-8x32mm Rifle Scope 30mm Tube and Romeo1PRO 1x30 Reflex Sight Combo w/Alpha2 Scope Mounts
This scope for the money is a great deal. I am in the Army. Put this scope on my issue M-4. It’s awesome for 300 meter targets. The red dot work great to do CQB. The glass on this scope seems really clear to me and other soldiers . The scope is no...
Read More...
The scope came in a nice package and was easy to assemble. Unfortunately, Sig Sauer did not provide any lens covers for the scope. Considering the price of this optic, this should’ve been included. It is always the last 5% of the journey that makes o...
Read More...
I have yet been able to put on my rifle, however I was able to play with the BDX App and Rangefinder. Even without these other tools the glass provides a crip and clean image. Add on BDX and configured ballistics with adapter MOA and yardage, and you...
Read More...
I was looking for a Scope/Canted Red Dot option for a while, and didn’t like how you have to mount many of the red dots either forward or rear of the scope. So when I saw this option from Sig, I was sold.
This is an awesome combination to have for ...
Read More...
Best scope combo i have the dot alone is 450 bucks this thing is a deal i love all the bdx stuff its dead on
Aww im left handed so i suck 2 stars
No cap covers im poor 4 stars
Dont listen to these fools
Perfect for long to short range use. You get the Sig BDX and Sig Romeo 1 that come assembled together! A Romeo 1 by itself is $400+ so this deal is a steal! Ready to go all you need to do is put in the batteries that already come with it. I “zeroed” ...
Read More...
Color: Black Objective Lens Diameter: 32 mmFinish: Matte Magnification: 2.5 - 8 xFabric/Material: Cotton Reticle: BDX-R1 Digital Tube Diameter: 30 mmObjective Window Size: 32 mmRing Height: Medium Illumination Color: Red Illumination Type: LED Brightness Settings: 10 Eye Relief: 2 inAdjustment Type: MOA Adjustment Click Value: 0.25 MOALength: 6 Parallax: Adjustable Lens Material: Glass Optical Coating: HD Width: 1 inHeight: 1 in, 3 inBattery Type: CR2032 Battery Quantity: 1 Included Accessories: Standard Battery Life: 20,000 hoursCondition: New Weather Resistance: Yes Water Resistance Level: IPX-6 Ring Quantity: Pair Shockproof: Yes Fogproof: Yes Package Type: Box Magnification Type: Variable Switch Type: Button Attachment Type: Riflescope Ring Gun Rail: Picatinny
Code: SD9-RS-BDXAR-SOSBDX321R1
MPN: SOSBDX321R1
UPC: 798681642670
Product No Longer Available
Product Info for SIG SAUER Sierra3BDX 2.5-8x32mm Rifle Scope 30mm Tube and Romeo1PRO 1x30 Reflex Sight Combo w/Alpha2 Scope Mounts
Check out the Sig Sauer Sierra3BDX2.5-8x32 Rifle Scope to get a crisp and clear optic that will allow you to sight targets with enhanced precision. The Sig Sauer Rifle Scope features a BDX-R1 digital reticle that integrates a ranging feature and windage holdover. With state-of-the-art glass that is multi-coated and polished, this Rifle Scope from Sig Sauer offers a clear view with high, medium and low mounted eyepieces with a rapid zoom magnification for a vast range of shooting experiences. The Sig Sauer Sierra3BDX 2.5-8x32 Rifle Scope has a 10-position rheostat to adjust the 10 brightness settings to best suit your needs in the field, and oil resistant and waterproof, this Sig Sauer Rifle Scope is ready for your next hunting or range outing.
The most innovative, direct view thermal sight in the world. The ECHO3 uses SIG SAUER® BDX® technology and can record both video and images in 8 different color palettes.
Features of SIG SAUER Sierra3BDX 2.5-8x32mm Rifle Scope 30mm Tube and Romeo1PRO 1x30 Reflex Sight Combo w/Alpha2 Scope Mounts:
Compact Thermal Reflex Style Sight (Don’t get Stuck “Behind” a Scope)
BDX Enabled WiFi/Bluetooth®, Allowing Active Reticles that Change with KILO® Rangefinder Input.
Customizable Fixed Reticles that are Configured from the BDX Mobile Application
Your Browser is Outdated
