GS3 4-20x50

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The new Steiner GS3 “game sensing” scope utilizes exclusive CAT (color adjusted transmission) lens coatings to amplify contrast in the peak human vision sensitivity range. The optimized contrast effectively separates game from leafy or shadow-dappled backgrounds, exposing your target to a clean, accurate shot. And the GS3 5x zoom range lets hunters from eastern whitetail country to western big game ranges pair their new scope with their favorite centerfire, rimfire or muzzleloader rifle. And or course, Steiner’s bedrock reliability will always deliver unfailing performance, whatever firearm or target you prefer.

Vesatile enough for prairie dogs, big game or the bean field.

  • Magnification 4x-20x
  • Tube Diameter 30mm
  • Length 16.4
  • Weight 28.2 oz
  • Item no. 5007 (Plex S7)
  • Item no. 5008 (Plex S1)
MSRP New: 

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Product Comparisons

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Product Features: 

New 5x Zoom Range

provides sharp resolution at long distances for more accurate shooting for wide open areas.


CAT™ Color Adjusted Transmission

amplifies contrast in the peak human vision sensitivity range, to spot game in any environment.


Steiner Plex S1/S7 Reticles

help determine holdover for distance and cascading dots/lines compensate for wind.


Short Mounting Length

of just 5.4 inches for mounting on short actions, muzzleloaders or lightweight mountain rifles.


Rugged 30mm Tube

milled from solid aluminum stock so there are no welds or seams, for greater strength and durability.



durable construction you can trust to stand up to any cold or wet condition.

GS3 4-20x50 is rated 4.5 out of 5 by 2.
Rated 4 out of 5 by from Features are great ergonomically, although magnification knob is very stiff and pulls you off target. Could also use a longer eye relief. It has served me well in both Africa and here in North America. The 50mm allows for quick target acquisition. Optics are crystal clear. l
Date published: 2014-08-05
Rated 5 out of 5 by from Best for the money! Just bought this scope at Easthill Outdoors in Ont. Canada, my favourite shop. Put it on a Sako Finnlight 270 WSM, with Optilock bases and extra low rings and took it to the range. It's mid January at -20C with a good wind and shot 5 quarter sized groups at 200yds. I can't wait to try it at longer distances. Great package, awesome products!
Date published: 2015-01-15
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You have two weights listed 28.2 oz and 22 oz which is correct for the 4-20x50 ? -  I am asking this question too- it is pretty important especially for those who are not close to a dealer.

Asked by: Mack
Our catalog info is 28.2, so we're sticking with that here. It looks like one of our customer service reps weighed it - the scope alone - and got 24.8 oz. I can't find the reference to 22 oz - that was most likely a typo that was fixed.
Answered by: TeamSteiner
Date published: 2015-03-11

Recently purchased a GS3 and love it. I plan on purchasing a second one. Do you guys offer cerakote on your scopes??

Asked by: Dale222
Thanks for the supporty! We do not offer any scopes in Cerakote.
Answered by: TeamSteiner
Date published: 2015-03-11

You have two weights listed 28.2 oz and 22 oz which is correct for the 4-20x50 ?

Asked by: Benny
The exact weight of the 4-20x50mm scope -ONLY- is 24.8oz, as measured by a postal scale.
Answered by: pharding
Date published: 2015-03-11

OK Guys which is it.... Made in US or Europe ?!?!

Asked by: DaveM
All Steiner products come direct from Germany, with the exception being the GS3 and T5Xi scope lines, which are manufactured at 331 E 8th Street, Greeley, CO, USA
Answered by: pharding
Date published: 2015-03-11

I purchased 2 of the 4-20 with the s7 thinking tgetting the subtension for the reticle would be a snap. Cannot find it anywhere. Just a reference to a .22-250 and even that has no bullet weight etcetera to be helpful. Can you send me the information?

Asked by: Talon
If you would like to call or email our Customer Service Team, they have Ballistics calculation software that can pinpoint the impact distance for each of those lines. 888.228.7747 |
Answered by: pharding
Date published: 2015-03-11

I would like to put Butler flip-up scope caps on my GS3 4-20x50. Could you tell me what size caps would fit this scope?

Asked by: PS2014
For the objective lens you will need a size 43 scope cap, for the eye piece you will need a size 20. You can find more on their product information for these on their web site here:
Answered by: SteinerCS
Date published: 2015-03-11

I'm planning to order this scope for my Sauer .308 Win. How well it stands the recoil? Can I use it up to -30(-35) degrees celsius? Which reticle is better S1 or S7? Does it affect the quality if it was manufactured in the US instead of Germany? Thanks!

Asked by: renxxx
All Steiner scopes are tested to withstand recoil up to .50 cal, so it should have no problem with your Sauer .308 Win. You will be able to use your scope in -30C temperatures, although if it's that cold you may have a bit of trouble with exterior fogging. We test the scopes by freezing them at -18C for several days, and they work just fine once they've been thawed out. All of our products are sent to us from Germany. To better answer your question regarding reticle choice, would it be possible for you to contact us here at We need a bit more information about what you'll be using your scope to do. Hope this answered your questions!
Answered by: SteinerCS
Date published: 2015-03-11

Does the G3 have a "Zero stop" for a confirmed return to zero? Where can I find what the reticle subtentions are at a given magnification?

Asked by: Andrew
The GS3 scope does not offer a zero stop feature. The scope is more of a reticle based scope rather than a dialing scope. However, you can rotate the dial indicator back to zero once you have made your adjustments. A reticle description manual is currently in process and will be posted online shortly. Please feel free to email for subtention information.
Answered by: jolaw
Date published: 2015-03-11
  • 2015-03-26T18:44CST
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Riflescope Specifications: 
Item Number5007-S7 | 5008-S2
Objective Lens Diameter50 mm
Tube Diameter30 mm
Focal Plane2nd
Field of View @ 100 yds.25.8 / 5.5
Eye Relief3.5 - 4.3
Exit Pupil (mm)11 - 2.5
Weight (oz.)28.2
Diopter Adjustment Range+2 to -3
ReticleSteiner Plex S7 or Plex S1
Elevation Adjustment KnobResettable Zero
Wind/Elevation Click Value1/4 MOA
Windage Range @100 m48 MOA
Elevation Range @100 m64 MOA
Parallax/FocusSide Focus
Parallax/Focus Range164 ft -infinity
Nitrogen FilledYes
Special FeaturesCAT™ Color Adjusted Transmission Coatings
WarrantyHeritage™ Warranty
Specifications subject to change without notice


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