Argos HMR 4-20x50 Second Focal Plane Riflescopes
- Rifle Scope
- 50 mm
- 5x
- 20x
- Better rated than 84%
A waterproof, argon-purged 4-20x50 scope with a zero stop turret at an accessible price point, though there is no review history yet to weigh against the spec sheet.
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How it ranks among the 359 rifle scopes we track
5.0★ across 1 Amazon ratings, Bayesian-smoothed toward the category average.
1 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: limited - limited rating history.Last refreshed Jun 22, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Argos HMR is a 4-20x50 second focal plane riflescope with fully multi-coated optics and an argon-purged, waterproof and fogproof aluminum housing.
Argos positions this as an entry point into higher magnification hunting optics rather than a premium build, with a zero stop turret for returning to a saved setting after adjustments. There is not yet buyer review data to confirm field performance.
- 4-20x50 second focal plane riflescope
- Fully multi-coated optical system
- Aircraft-grade aluminum, waterproof and fogproof
- Precision zero stop turret
Who it's for
Suited to hunters wanting a mid-priced scope that covers close to long range work in one optic. Not the choice for anyone needing a first focal plane reticle, since subtensions here only hold true at max magnification.
Strengths and trade-offs
Drawn from this product's published specifications.
- 50mm objective lens for low light brightness
- Zero stop turret for fast return to a saved zero
- Argon-purged housing for waterproof, fogproof use
- Second focal plane reticle only reads true at max magnification
- No buyer reviews yet to confirm field performance
Performance notes
Fully multi-coated lenses are meant to cut reflected light and boost light transmission compared to single-coated glass, and the 50mm objective lens is sized to support that in low light. Because it is second focal plane, reticle subtensions are accurate only at the top of the 4-20x zoom range, so ranging with the reticle at lower power will be off.
Specifications
| Brand | Optics |
|---|---|
| Dimensions & fit | |
| Objective Lens Diameter | 50 mm |
| Item Weight | 1.31 pounds |
| Construction & materials | |
| Material Type | Aluminum or Polymer |
| Color | black |
| Compatibility & installation | |
| Mounting Type | Planter |
| Compatible Devices | Rifle |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Magnification Minimum | 5x |
| Magnification Maximum | 20x |
| Sport Type | Hunting |
| Reticle Type | Mil-Dot |
| Night vision | No |
| Product Style | MIL-DOT |
Other Optics rifle scopes
How it compares
This product against the closest alternatives we track in rifle scopes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Argos HMR 4-20x50 Second Focal Plane RiflescopesThis product | 5.0 / 5 | 1 | 2.7 / 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 Optics rifle scopes
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What does second focal plane mean for the Argos HMR?
The reticle stays the same visual size as you zoom, so its subtensions for ranging or holdover are only accurate at maximum magnification, 20x here.
Is the Argos HMR waterproof?
Yes, it uses argon purging for waterproof and fogproof performance in the aluminum housing.
What magnification range does it cover?
4-20x through a 50mm objective lens.