Monstrum Guardian 6-18x50 AO Rifle Scope
- Magnification Minimum: 6x
- Magnification Maximum: 18x
- Mounting Type: Weaver Mount
- Product Style: Tactical
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Owners who compare it to pricier scopes still call the glass on this Guardian clear and the turrets precise, with tight eye relief as the main trade-off.
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ASIN: B0GWSBC9V2Category: Rifle Scopes
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Overview
Monstrum's Guardian is a 6-18x50 second focal plane rifle scope with adjustable objective for parallax control, aimed at targets out to 1000 yards and beyond. It has a nitrogen-charged aluminum body, 1/4 MOA locking turrets, and ships with mounting rings and flip-up lens covers.
The included Picatinny rings and flip-up caps mean it is ready to mount without buying extras, though at least one reviewer questioned whether the 18x end of the zoom range is fully accurate against a known 12x scope. One unit arrived in an unsealed box with the battery pre-installed, raising a fair question about whether it had been opened before.
- 6-18x50 second focal plane with adjustable objective
- Nitrogen-charged aircraft grade aluminum body
- 1/4 MOA locking windage and elevation turrets
- Includes Picatinny rings and flip-up lens covers
Who it's for
Suited to hunters and range shooters wanting a clear, adjustable parallax scope without paying premium scope prices, especially for shooting out to a few hundred yards. Less ideal for anyone needing generous eye relief, since one reviewer described the window as narrow between clear and blurred.
Pros and cons
- Glass praised as clear with no fog or halo
- Turrets give distinct, accurate 1/4 MOA clicks
- Includes mounting rings and flip-up lens covers
- Eye relief window described as narrow by one reviewer
- Actual 18x zoom questioned against a known reference scope
- At least one unit arrived in an unsealed box
Performance notes
The nitrogen-charged sealed tube is the part responsible for resisting fog, which more than one owner confirmed held up without haze or halo around the crosshair.
Specifications
| Brand | Monstrum |
|---|---|
| Construction & materials | |
| Material Type | Aluminum |
| Color | Flat Dark Earth |
| Compatibility & installation | |
| Mounting Type | Weaver Mount |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Magnification Minimum | 6x |
| Magnification Maximum | 18x |
| Product Style | Tactical |
| Thread Type | Picatinny/Weaver |
| Sport Type | Hunting, Target Shooting |
| Reticle Type | MOA |
Frequently asked questions
What magnification range does the Monstrum Guardian offer?
It covers 6-18x with a 50mm objective lens, targeting out to 1000 yards and beyond.
Does the scope include mounting hardware?
Yes, it ships with high profile Picatinny/Weaver rings and a set of flip-up lens covers.
What turret adjustment does it use?
Locking windage and elevation turrets adjust in 1/4 MOA clicks per reviewer reports.