Monstrum 2-7x32 AO Rifle Scope
- Magnification Minimum: 2x
- Magnification Maximum: 7x
- Objective Lens Diameter: 45 mm
- Mounting Type: Picatinny Mount
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A solid low-cost scope for .22LR and closer-range rifles that holds zero, but confirm mount compatibility first and don't expect the illumination to show up in bright sun.
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ASIN: B073HRB3RMModel: 2-7x32 AOCategory: Rifle Scopes
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Overview
A budget AO rifle scope with 2-7x magnification and an illuminated red/green rangefinding reticle, aimed at rimfire rifles and closer-range centerfire use rather than long-range shooting.
The adjustable objective handles parallax and range estimation at this price point, but reviewer feedback splits on two points worth knowing before mounting it: the illuminated reticle is hard to see in direct sun, and scope length varies enough between generations that some Monstrum cantilever mounts won't clear the turrets. Neither is a dealbreaker, but both change what you should check before buying.
- 2-7x magnification for closer to mid range
- Adjustable objective for parallax correction
- Nitrogen-charged, water and fog resistant tube
- Range finder reticle for holdover estimation
Who it's for
Fits shooters mounting on .22LR, rimfire magnum or lower-recoil centerfire rifles for plinking and closer targets. Not the choice for buyers wanting daylight-bright illumination or a guaranteed fit with a specific mount without checking generation compatibility first.
Pros and cons
- Holds zero over extended round counts
- Clear glass and easy zeroing for the price
- Adjustable objective reduces parallax at range
- Five-level red/green illumination for low light
- Illumination hard to see in direct sunlight
- Eye relief runs short for some AR mounts
- Mount fit can vary between scope generations
Performance notes
The red/green illumination adds contrast in low light, but it isn't a bright-daylight feature; one reviewer found the reticle stayed black even at max brightness in full sun unless shaded.
Specifications
| Brand | Monstrum |
|---|---|
| Model | 2-7x32 AO |
| Dimensions & fit | |
| Objective Lens Diameter | 45 mmhigher than 68% of 309 rifle scopes |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Black |
| Compatibility & installation | |
| Mounting Type | Picatinny Mount |
| Compatible Devices | Rifle |
| Other details | |
| Magnification Minimum | 2x |
| Magnification Maximum | 7x |
| Night vision | No |
| Product Style | Tactical |
| Sport Type | Hunting |
| Reticle Type | Mil Dot |
Closest rivals on specs
Frequently asked questions
Will the illuminated reticle work in bright daylight?
The base black reticle is always visible, but the red/green illumination itself is reported hard to see in direct sun, even at maximum brightness.
Does this scope fit Monstrum's own cantilever mounts?
Not guaranteed. One buyer found the turrets hit the mount rings due to a length difference between scope generations, so check compatibility before pairing them.