M40 3-9X40 MK2 Rifle Scope
- Rifle Scope
- 40 mm
- 3x
- 9x
A 1 inch, 3-9x40 scope aimed at CMP Vintage competition and classic rifle builds, combining stainless steel turret internals with a mechanical stadiametric rangefinder rather than modern electronics.
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How it ranks among the 359 rifle scopes we track
0 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
A 3-9x40mm rifle scope built around a 1 inch tube with stainless steel turrets and quarter-MOA click adjustments, finished in a green anodized coating that echoes the original military M40 scope. It includes a built-in Accu-Range stadiametric reticle for distance estimation without batteries.
Hi-Lux markets this as the highest-power scope eligible for CMP Vintage competition rules, positioning it as much for period-correct rifle builds as for practical hunting use. The stadiametric rangefinder built into the reticle is a mechanical, no-battery way to estimate range using an 18 inch target reference, a feature more common on older military-style scopes than modern electronic optics.
- 3-9x40mm magnification range
- 1 inch main tube, stainless steel turrets
- Quarter-MOA click adjustments
- Built-in Accu-Range stadiametric reticle
Who it's for
Suits a shooter building a vintage or CMP-legal rifle setup who wants a scope with period-correct styling and a mechanical rangefinding reticle. Less suited to a shooter who wants illuminated reticles or first focal plane tracking, neither of which this scope offers.
Strengths and trade-offs
Drawn from this product's published specifications.
- Stainless steel turret construction for repeatable adjustments
- Built-in stadiametric rangefinder needs no batteries
- Meets CMP Vintage competition eligibility
- Quarter-MOA click precision
- No illumination on the reticle
- Second focal plane design, so reticle subtensions only hold true at one magnification
- 1 inch tube offers less internal adjustment range than 30mm or 34mm scopes
Performance notes
Quarter-MOA click adjustments run through stainless steel turret internals, which the listing frames as built for repeatable, long-term durability rather than tool-free zero stop convenience. The Accu-Range reticle works by bracketing a known 18 inch target width between its horizontal lines and reading the estimated range off a tombstone-shaped scale, a technique that takes practice but needs no batteries.
Specifications
| Brand | hi-lux |
|---|---|
| Dimensions & fit | |
| Objective Lens Diameter | 40 mm |
| Item Weight | 2 pounds |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Green |
| Compatibility & installation | |
| Mounting Type | Ring Mount |
| Compatible Devices | Rifle |
| Included components | |
| Unit Count | 1 |
| Included Components | Flip Up Lens Covers, M40 Scope, Microfiber Cloth |
| Warranty & support | |
| Warranty Description | Lifetime |
| Other details | |
| Magnification Minimum | 3x |
| Magnification Maximum | 9x |
| Sport Type | Benchrest Shooting |
| Reticle Type | Duplex |
| Night vision | No |
| Product Style | Vintage Inspired Modern Reproduction Scope |
How it compares
This product against the closest alternatives we track in rifle scopes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| M40 3-9X40 MK2 Rifle ScopeThis product | - | - | 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 hi-lux rifle scopes
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is this scope legal for CMP Vintage competition?
Yes, the listing describes it as the highest-power scope eligible under CMP Vintage rules.
How does the rangefinding reticle work?
It uses an 18 inch target reference bracketed between the reticle's horizontal lines, with distance read off a tombstone-shaped scale, no batteries required.
What is the click adjustment value?
Quarter-MOA per click.