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Monstrum Stealth 4x30 Fixed Magnification Scope

4.4 4.4 out of 5 stars 132 ratings
$79.95
FREE Returns
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Black | MX1 Reticle
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Purchase options and add-ons

Brand Monstrum
Style Black | MX1 Reticle
Sport Hunting
Item Weight 10 Ounces
Material Aluminum
Magnification Maximum 4 x
Objective Lens Diameter 30 Millimeters
Magnification Minimum 4 x
Compatible Devices Cross Bow
Mounting Type Cantilever Mount

About this item

  • Fixed 4x magnification, for targeting out to 300 yards and beyond
  • A new and improved optics assembly, providing a shorter scope with a long eye relief of 6+ inches
  • Aircraft grade 6061 aluminum scope body with a sealed, nitrogen-charged tube for resistance to water and fog
  • Fully illuminated reticle with inline dial controlled brightness adjustments, available with either MOA hashmark or BDC style reticles
  • Package includes a custom one piece offset scope mount for more flexible scope placement
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    About Us:

    Monstrum is the leading manufacturer of affordable, high quality rifle optics and accessories. We have over 15 years of experience in engineering and manufacturing scopes.

    Our optics are designed to provide superior performance in any environment. Whether you’re hunting in the woods or shooting at the range, we have the perfect scope for you.

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Product Description

SG430

Monstrum Stealth 4x30 w/ BDC Reticle

The Monstrum Stealth Series is the latest iteration from our line of SFP rifle scopes! The Stealth 4x30 AO is a full-featured scope suitable for hunting, target shooting, or tactical use with an adjustable objective lens or AO - that allows for sharper focus of the target image, elimination of parallax, and range estimation.

SG430AO-XB
SG430AO Reticles

Technical Specifications

Reticle: BDC or MX1
Materials: 6061 Aircraft Grade Aluminum
Scope Range: Close Range, 100+ Yards
Magnification: 4x
Objective Diameter: 30 mm
Tube Size: 30 mm
Eye Relief: 4 - 4.5+ inches
Weight: 10 oz
Length: 9 inches
Illumination: 5-levels of red and green illumination
Nitrogen Purged? Yes, resistant to fog and water
Integrated Throw Lever? Yes

Other Monstrum Scopes:

SG430AB

Stealth 4x30 AO Scope

SG430AB

Stealth 4x30 AO Scope

ST3932

Talos 3-9x32 Scope

SG430

Stealth 3x30 Scope

SG3940AO-B

Guardian 3-9x40 Scope

PM332

Marksman Prism Scope

See Details
Customer Reviews
4.4 out of 5 stars
132
4.4 out of 5 stars
132
4.0 out of 5 stars
48
4.1 out of 5 stars
70
4.4 out of 5 stars
214
—
Price
$79.95 $79.95 $69.95 $79.95 $72.95 —
Reticle:
BDC Reticle MX1 Crossbow Reticle MX1 MOA Circle Dot, DX1
Scope Range:
Close to Mid Range, 300+ Yards Close to Mid Range, 300+ Yards Close to Mid Range, 400+ Yards Close to Mid Range, 300+ Yards Close to Mid Range, 500+ Yards Various 100 to 400+ Yards
Full Multi-Layer Lens Coating:
✔ ✔ ✔ ✔ ✔ ✔
Illuminated Reticle:
✔ ✔ ✔ ✔ ✔ ✔
Shock, Water, and Fog Proof:
✔ ✔ ✔ ✔ ✔ ✔
Colors Available:
Black or FDE Black Black Black Black Black or FDE

Product information

Technical Details

Additional Information

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Monstrum Stealth 4x30 Fixed Magnification Scope

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
132 global ratings

Customers say

Customers like the quality, light weight, and ease of installation of the aiming scope sight. They mention that it's a compact lightweight simple scope that does not make their AR much heavier. They appreciate the clear glass and the crisp illumination. Customers also appreciate the visibility of the illuminated reticle in various lighting situations.

AI-generated from the text of customer reviews

34 customers mention32 positive2 negative

Customers are satisfied with the quality of the aiming scope sight. They mention that it has a super clear picture and nice eye relief. The reticle has green and red illumination. The quality of optics became evident after mounting it on their MSR. The scope is solidly built with convenient lens caps. Overall, customers are happy with the product's quality and durability.

"...my revised review….If you are looking for a scope that is built from quality materials, light weight, crystal clear lenses, with awesome..." Read more

"...Upon assembling the sight and mounting it on my MSR, the quality of the optics became evident...." Read more

"This scope is clean, Looks good and feels good with a nice eye relief...." Read more

"Compact lightweight simple scope. The optional MX1 reticle is very nice! The glass is clear and illumination is crisp...." Read more

25 customers mention25 positive0 negative

Customers are satisfied with the clarity of the aiming scope sight. They mention that the glass is super clear, has an average paralax, and is easy to zero. Some say that the optics are good and the picture is super bright.

"...for a scope that is built from quality materials, light weight, crystal clear lenses, with awesome illumination and all that with a great price,..." Read more

"...The image was clear and the green and red illumination settings of the sight appear to be excellent...." Read more

"...The optional MX1 reticle is very nice! The glass is clear and illumination is crisp...." Read more

"Very nice Scope. Has super clear picture and very nice eye relief...." Read more

19 customers mention15 positive4 negative

Customers like the visibility of the aiming scope sight. They say the glass is clear and the illumination is crisp. They also say the reticle is easily visible in various lighting situations, with green and red illumination. Some customers appreciate the optic color options and the green color.

"...quality materials, light weight, crystal clear lenses, with awesome illumination and all that with a great price, then DON’T buy this scope!..." Read more

"...Very little shadowing, Easy to zero, illumination is not hazy and the scope does not make my AR much heavier. Overall A good bang for the buck...." Read more

"...The optional MX1 reticle is very nice! The glass is clear and illumination is crisp...." Read more

"This has a near nonexistent scope shadow, the size of the ocular lens compared to the scope body allows it to work well for both eyes open shooting...." Read more

15 customers mention15 positive0 negative

Customers appreciate the value of the aiming scope sight. They say it's a fantastic buy for the price, has super quality, and is a budget-friendly option. Some mention that the glass seems OK given the price.

"...crystal clear lenses, with awesome illumination and all that with a great price, then DON’T buy this scope! You will regret it." Read more

"...Overall A good bang for the buck. I’ll be testing the durability shortly." Read more

"This budget-friendly option light and fairly sturdy. It is simple to mount and adjust in minutes...." Read more

"Glass seems OK given the price...." Read more

12 customers mention12 positive0 negative

Customers like the eye relief of the aiming scope sight. They mention that it has decent eye relief, clear glass, and is compact and light.

"This scope is clean, Looks good and feels good with a nice eye relief...." Read more

"Very nice Scope. Has super clear picture and very nice eye relief...." Read more

"...(particularly in natural lighting when outdoors), and it offers a good bit of eye relief for offset mounting and co-witness sighting...." Read more

"Nothing to dislike works great clear and great eye relief I was surprised for the money you get a great optic in a small package." Read more

9 customers mention9 positive0 negative

Customers find the installation of the aiming scope sight to be easy. They mention that it works with or without batteries, it's easy to use, and that no tools are required. They also say that the fit and finish is good and that it mounts very nicely.

"...boresighter to do a 25 yard sight-in and was amazed how easy it was to adjust the turrets, not needing a screwdriver to adjust them...." Read more

"...It is simple to mount and adjust in minutes...." Read more

"...Simply put, great product, easy to use, and affordable. No photos provided this time, thanks to Amazon guidelines." Read more

"...Easy to get on target very quickly...." Read more

9 customers mention9 positive0 negative

Customers like the light of the aiming scope sight. They mention that it is compact, lightweight, and simple. The clear glass is not hazy and it does not make their AR much heavier.

"...you are looking for a scope that is built from quality materials, light weight, crystal clear lenses, with awesome illumination and all that with a..." Read more

"...Easy to zero, illumination is not hazy and the scope does not make my AR much heavier. Overall A good bang for the buck...." Read more

"Compact lightweight simple scope. The optional MX1 reticle is very nice! The glass is clear and illumination is crisp...." Read more

"...on my scout rifle I returned it which is too bad because it seemed light, and compact." Read more

8 customers mention8 positive0 negative

Customers are satisfied with the performance of the aiming scope sight. They mention that it works well for getting down range, has average paralax, and is perfect for close range shooting.

"Nothing to dislike works great clear and great eye relief I was surprised for the money you get a great optic in a small package." Read more

"...ocular lens compared to the scope body allows it to work well for both eyes open shooting...." Read more

"Great lightweight, compact scope that works perfectly on my AEA 30cal. air rifle." Read more

"Works well for getting down range, haven't used in the bush." Read more

Scratched Up
3 Stars
Scratched Up
Recieved brand new scope with the inside edges of the metal tube all scratched up. Outside also has some weird marks. Glass is fine. Wonder if they are all like this, or should I return it?
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Top reviews from the United States

RJ
5.0 out of 5 stars Forced to edit my 1st review of this scope
Reviewed in the United States on April 22, 2024
Style: Black | MX1 ReticleVerified Purchase
So according to Amozon, my first review of this product could not be posted because I explained how great I thought it is (seriously). So, here is my revised review….If you are looking for a scope that is built from quality materials, light weight, crystal clear lenses, with awesome illumination and all that with a great price, then DON’T buy this scope! You will regret it.
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James Gerondakis
5.0 out of 5 stars Works Well - Excellent Quality
Reviewed in the United States on April 4, 2024
Style: Flat Dark Earth | BDC ReticleVerified Purchase
When I received the Monstrum Stealth 4x30 Sight, I was impressed as to the care that had been taken in packaging it, unlike most Chinese-made items like this. Upon assembling the sight and mounting it on my MSR, the quality of the optics became evident. The image was clear and the green and red illumination settings of the sight appear to be excellent. I used a laser boresighter to do a 25 yard sight-in and was amazed how easy it was to adjust the turrets, not needing a screwdriver to adjust them. Now I will be heading to the range for final sight-in. Again, the quality of the Monstrum Stealth 4x30 Sight appears to be excellent and is exactly want I needed for my MSR.
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Zion
4.0 out of 5 stars pretty decent
Reviewed in the United States on January 4, 2024
Style: Black | MX1 ReticleVerified Purchase
This scope is clean, Looks good and feels good with a nice eye relief. Very little shadowing, Easy to zero, illumination is not hazy and the scope does not make my AR much heavier. Overall A good bang for the buck. I’ll be testing the durability shortly.
2 people found this helpful
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Allen E. Kaczor
5.0 out of 5 stars Just what I was looking for
Reviewed in the United States on February 22, 2024
Style: Black | MX1 ReticleVerified Purchase
Compact lightweight simple scope. The optional MX1 reticle is very nice! The glass is clear and illumination is crisp. Zeroed in quickly and held on target for 100 rounds of my new Ruger Carbine. Very satisficed customer. This is my second Monstrum product and it won't be my last.
One person found this helpful
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AseAware
5.0 out of 5 stars Great Fixed 4x
Reviewed in the United States on March 21, 2024
Style: Black | MX1 ReticleVerified Purchase
Very nice Scope. Has super clear picture and very nice eye relief. I unfortunately wasn't able to use the nice mount that ships with it, as it sat a bit too high on my henry big boy.
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Jake
3.0 out of 5 stars Decent Budget-Minded Option
Reviewed in the United States on December 1, 2023
Style: Black | MX1 ReticleVerified Purchase
This budget-friendly option light and fairly sturdy. It is simple to mount and adjust in minutes. The sight picture is clear (particularly in natural lighting when outdoors), and it offers a good bit of eye relief for offset mounting and co-witness sighting. The mount screws are more sensitive to recoil and will loosen when firing for extended periods—which will cause the scope to move & adjust and lose its leveling/zero if not regularly checked for tight fit.

The reticle does appear very thin without illumination, and this could pose issues for shooters who have difficulty seeing or impaired eyesight. The magnification also appears weaker than product images would suggest—and this does limit the effective range of this optic. The average shooter should be capable of holding groups effectively within and out to a range of 100 yards on a standard silhouette target with this optic; but I would not advise this optic for applications of intended greater ranges.

Overall, this budget-friendly option should satisfy the average shooter who purchases on the expectation of a simple, no frills optic for applications within relatively short distances.
3 people found this helpful
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jim rains
5.0 out of 5 stars Very cool variable optic with a great reticle
Reviewed in the United States on April 2, 2024
Style: Black | BDC ReticleVerified Purchase
Nothing to dislike works great clear and great eye relief I was surprised for the money you get a great optic in a small package.
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Thomas
5.0 out of 5 stars Clear glass, great eye relief
Reviewed in the United States on February 8, 2024
Style: Black | BDC ReticleVerified Purchase
This has a near nonexistent scope shadow, the size of the ocular lens compared to the scope body allows it to work well for both eyes open shooting. Illumination is not too bright and the control is on the left hand side. I very much like the green color, it reminds me of the old Timex "Indiglo" watch hands.
One person found this helpful
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