Monstrum Spectre 1-10x28 LPVO Rifle Scope
- Rifle Scope
- 28 mm
- 1x
- Target Shooting
- More reviewed than 71%
A capable low power variable scope for the price, with clear glass and a mount included, but budget for slightly more weight and a tighter eye box than the listing suggests.
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How it ranks among the 359 rifle scopes we track
4.4★ across 166 Amazon ratings, Bayesian-smoothed toward the category average.
166 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 359 rifle scopes we track - how the scorecard works · full rifle scopes data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jun 22, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A 1-10x28 low power variable rifle scope with a 34mm tube, second focal plane reticle (BDC B1 or MX1 box) and a built-in throw lever. Ships with a 34mm offset cantilever mount and flip-up lens covers, aimed at AR-pattern rifle owners who want one scope for close and mid range work.
This is a budget LPVO built around a wider 34mm tube for extra light transmission and a shorter body with a wider eye box than Monstrum's earlier optics. Reviewers who mounted it on .308 and 5.56 platforms report clear glass and reliable zero retention, though the printed weight and eye relief run tighter in practice than advertised.
- Second focal plane reticle stays the same size at every magnification for visibility
- Integrated throw lever for fast power changes
- Includes 34mm offset cantilever mount
- Spring loaded flip-up lens covers included
Who it's for
Fits AR-10 and AR-15 owners who want a single scope that works both eyes open at 1x and dials up to 10x for longer shots, without paying for a premium tier LPVO. Less suited to shooters who need generous eye relief or a lightweight build.
What buyers say
From Amazon customer reviews.
Buyers who mounted this on AR-10 and AR-15 builds consistently praise the glass clarity and light transmission from the 34mm tube, and several report it holding zero through 50 or more rounds. The most detailed critical review flagged the scope running heavier than its listed weight and an eye relief closer to 5 inches, which makes the eye box less forgiving than expected.
Strengths and trade-offs
Drawn from this product's published specifications.
- Clear glass reported across the full 1-10x range
- 34mm tube pulls in noticeably more light
- Turret clicks track well enough to zero in a few shots
- Mount and flip-up lens covers included
- Heavier in hand than the listed weight, measured near 19 to 23 ounces with mount
- Eye relief runs short at roughly 5 inches
- Fit and finish varies by buyer on this overseas build
Performance notes
The 34mm tube and added anti-reflective coating are meant to pull in more light than a standard 30mm LPVO, and reviewers confirm the glass stays clear even at full 10x magnification. The integrated throw lever speeds up magnification changes in the field, and turret clicks are reported as crisp rather than mushy. One reviewer's own measurement put eye relief around 5 inches, which narrows the eye box more than typical LPVOs and rewards a consistent cheek weld.
Specifications
| Brand | Monstrum |
|---|---|
| Model | SN11028B-B1 |
| Dimensions & fit | |
| Objective Lens Diameter | 28 mm |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Black |
| Compatibility & installation | |
| Mounting Type | Cantilever Mount |
| Compatible Devices | Rifle |
| Included components | |
| Unit Count | 1 |
| Included Components | Spectre Rifle Scope, 34 mm Offset Cantilever Scope Mount, one pair of spring-loaded flip-up lens covers |
| Other details | |
| Magnification Minimum | 1x |
| Sport Type | Target Shooting |
| Reticle Type | BDC B1 Reticle |
| Thread Type | 34 mm |
| Night vision | No |
| Product Style | BDC-B1 Reticle | Black |
Other Monstrum rifle scopes
How it compares
This product against the closest alternatives we track in rifle scopes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Monstrum Spectre 1-10x28 LPVO Rifle ScopeThis product | 4.4 / 5 | 166 | 3.9 / 5 |
| UTG 3-12X44 30mm Compact ScopeUTG | 4.5 / 5 | 3,000 | 4.4 / 5 |
| Vortex Optics Diamondback Second Focal PlaneBrand | 4.7 / 5 | 1,500 | 4.3 / 5 |
| PINTY Tactical Rifle Scope Combo: Illuminated OpticsPinty | 4.4 / 5 | 1,100 | 4.3 / 5 |
| Firefield RapidStrike 1-6x24 SFP Riflescope KitFirefield | 4.5 / 5 | 900 | 4.3 / 5 |
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Questions about the Monstrum SN11028B-B1
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What magnification range does the Monstrum Spectre cover?
It runs 1-10x through a 34mm tube, using either the BDC B1 or MX1 box reticle depending on which version is ordered.
Does it come with a mount?
Yes, a 34mm offset cantilever scope mount and spring loaded flip-up lens covers ship with the scope.
How is the eye relief?
One buyer measured it at about 5 inches, tighter than many LPVOs, so expect the eye box to be more position sensitive.