Introduction
After testing the Stalker ED 5-40×56, we are staying in the same family with this Marcool Stalker ED 5-25×56 FFP IR Zero Stop, reference HY1602-2 / MAR-202. The two scopes clearly share the same DNA, with a substantial build, a 34 mm tube, a 56 mm objective lens, large turrets and ergonomics clearly geared towards shooting.
The main difference is obviously the magnification range. While the 5-40×56 is designed to offer very high magnification, this version tops out at 25×. That is ultimately a fairly conventional value and, in my opinion, probably covers 90% of the real-world uses for this type of scope. During my competition testing with the 5-40×56, I actually found myself shooting mostly between 8× and 12×. Very high magnification still has its advantages for observation or certain specific applications, but it is not necessarily essential for the shooting itself.
Construction and handling
The first impression given by this Stalker is that of a large, robust scope. This is not really specific to Marcool: with a 56 mm objective lens, a 34 mm tube and turrets of this size, most modern 5-25×56 scopes have similar proportions.
The one-piece 34 mm tube provides more room for the internal mechanism and, in this case, comes with a generous adjustment range. Marcool specifies a total travel of 35 MIL in elevation and 22 MIL in windage, which is a substantial range and consistent with the intended purpose of this scope.
The ergonomics have received quite a bit of attention. The diopter and magnification rings feature pronounced ribs, while the parallax control uses a pattern of small rectangles. Beyond the visual aspect, these different patterns make the controls easy to identify and reduce the risk of grabbing the wrong ring when making adjustments. The textured surfaces also provide a good grip during quick manipulation.
More generally, Marcool has clearly tried to give this Stalker a tactical identity, and not simply through its appearance. The numerous grip serrations, thick adjustment rings, substantial mounting rings and particularly large turrets give the impression of a scope designed to be manipulated regularly rather than simply set once and left alone. The different controls are easy to identify both visually and by touch.
A substantial package
The trade-off is the size and weight that come with this architecture. With its 56 mm objective lens, 34 mm tube and imposing turrets, the Stalker is clearly not trying to compete in the lightweight optics category.
Also make sure you use rings that are high enough to prevent the scope from touching the rifle!
The mount obviously adds further weight. Ready to use with its rings, our example weighs approximately 1,300 g. That is substantial, but much less of an issue on a platform intended for PRS or medium- to long-range tactical shooting than on a rifle designed to be carried for hours.
This bulk is ultimately the trade-off for an architecture built around a large objective lens, a generous adjustment range and oversized controls that are easy to manipulate.
Turrets and Zero Stop
The turrets follow the same philosophy as the rest of the scope. They are large, easy to grip, and the clicks are positive both by feel and by sound. You immediately know when you have moved one click, which is useful when making an adjustment without completely taking your eyes off the target.
Their large size also leaves plenty of room for particularly easy-to-read markings. Marcool also uses dual numbering: once you go beyond a full revolution, it becomes much easier to keep track of your actual position within the adjustment range. On the firing line, this helps reduce errors, particularly when switching between several distances.
Depending on the version, Marcool specifies either 1/10 MIL or 1/4 MOA clicks. Our example uses 1/4 MOA, or 0.25 MOA per click. To give readers unfamiliar with this unit a practical reference, one click moves the point of impact by approximately 7 mm at 100 metres and around 3.5 mm at 50 metres. This is a standard value for a precision riflescope, but fine enough to allow very gradual corrections.
There is also a Zero Stop which, once the rifle has been zeroed, provides a mechanical stop for returning to the original zero after applying elevation corrections.
Ultimately, the tactical character of this Stalker is not just about its appearance. Large turrets, generously sized adjustment rings, numerous textured gripping surfaces, clearly differentiated controls and highly visible markings all follow the same philosophy: making the scope quick and easy to operate.
FFP and MAR-202 reticle
The Stalker ED 5-25×56 uses a first focal plane reticle. Its apparent size therefore changes with magnification, while its subtensions remain valid throughout the entire 5-25× range. On a scope intended for regular use of the reticle’s hold marks, FFP avoids having to work at a specific magnification or make conversions.
This scope features the MAR-202, a reticle based on the now familiar Christmas-tree layout, with a lower section that allows vertical and horizontal corrections to be combined directly within the reticle.
Personally, I really like this type of layout. Once your holds are known, it allows you to move quickly from one distance to another without touching the turrets. With several targets at different distances, corrections can therefore be made “on the fly” using the reticle rather than counting clicks between each shot.
This is obviously a matter of shooting method. Some shooters prefer to dial their corrections systematically, while others rely mainly on holdovers. I personally fall more into the second category.
The MAR-202 nevertheless remains fairly conventional for a modern Christmas-tree reticle and does not excessively clutter the field of view. As always with an FFP reticle, it naturally appears finer at the lower end of the magnification range and progressively comes into its own as magnification is increased.
ED glass and image quality
As its name suggests, this Stalker uses ED (Extra-low Dispersion) glass. Its main purpose is to reduce the dispersion of different wavelengths of light and therefore chromatic aberration, which is particularly noticeable around high-contrast edges. For readers new to this type of optic, the goal is simply to produce a cleaner image with less colour fringing in high-contrast areas.
However, the ED label has become common enough that it cannot, by itself, be considered a guarantee of optical quality. The optical design, lens coatings and manufacturing quality also play an important role.
Distance approximately 2.3 km – 25× magnification
More generally, I now find it quite difficult to separate some mid-range Chinese scopes purely on image quality. The progress made in recent years has been significant and, under normal conditions, the latest Marcool, Discovery and standard Vector models I have used now offer very similar performance.
The Vector Continental I tested seemed to retain a slight advantage, but among the other models the differences have become small enough that it is difficult to establish a genuine hierarchy without comparing the scopes side by side under specific conditions. At my level and for my own use, they are now often much of a muchness.
This Stalker ED 5-25×56 is no exception. I found nothing particularly objectionable about its image quality: the image is clear, detail is well rendered and chromatic aberration is sufficiently controlled that it does not become distracting while shooting.
The differences between models may now be found more in other areas: performance at high magnification, eyebox forgiveness, field of view, reticle design, control ergonomics and mechanical quality. Ultimately, these factors can be more decisive than the simple impression of sharpness at the centre of the image.
Field of view
Marcool specifies a field of view of 4.45° at 5× and 0.89° at 25×. Values expressed in degrees can be rather abstract, however. In more practical terms, at 100 metres the scope shows an area approximately 7.8 metres wide at 5×, compared with only 1.55 metres at 25×.
These figures make the benefit of the 5-25× range easier to understand. At 5×, almost eight metres of terrain are visible at 100 metres, making it easier to locate a target or transition quickly from one target to another. At 25×, the field narrows to around one and a half metres, allowing the shooter to concentrate much more precisely on the target and its details.
For PRS or tactical use, the scope will therefore often be used somewhere between these two extremes, adjusting magnification according to the desired balance between field of view and observation detail.
Parallax adjustment
The parallax adjustment is located on the left turret and uses the rectangular textured pattern mentioned earlier. Its distinctive design makes it immediately identifiable from the scope’s other controls.
The specified range runs from 20 yards to infinity, or just over 18 metres to infinity. This is particularly well suited to a scope of this type while still allowing it to be used at relatively short distances.
On a scope capable of reaching 25×, parallax adjustment quickly becomes important, as incorrect parallax can cause an apparent shift of the reticle when the eye is not perfectly centred behind the eyepiece. As is often the case, the distances marked on the control should mainly be treated as reference points. In practice, parallax is best adjusted for the target and shooting position until the image is sharp and the reticle no longer appears to move across the target when the eye shifts slightly behind the eyepiece.
5-25× or 5-40×?
Having already tested the Stalker ED 5-40×56 review here , a comparison between the two models is inevitable.
Naturally, 40× offers more possibilities for closely observing a target or an impact and can be genuinely useful in certain disciplines. But not everyone needs that additional magnification.
This 5-25× ultimately uses a more conventional magnification range. At 5×, the field remains wide enough to locate a target, while 25× already provides considerable observation capability. More importantly, for my airsoft use I find myself working much more often in the lower half of this range than at the top end, whereas the opposite is true when I shoot PRS or long-range at distances beyond 200 or 600 metres.
The choice between the two models will therefore depend mainly on the intended use: shooters who genuinely need very high magnification will see the benefit of the 5-40×56, while this 5-25×56 already covers a particularly broad range for more general use.
Conclusion
This Stalker ED 5-25×56 is a good illustration of the level now reached by quality mid-range Chinese riflescopes. On models in this category, optical quality now covers, in my opinion, the vast majority of real-world needs: brightness is sufficient under normal conditions, chromatic aberration is well controlled and resolution is no longer a genuine limiting factor for shooting.
The differences therefore lie more in features, ergonomics and, above all, how well a scope suits its intended application. In that respect, the Stalker’s purpose is fairly clear.
With its 5-25× magnification range, 56 mm objective lens, 34 mm tube, FFP Christmas-tree reticle, Zero Stop, generous mechanical adjustment range and large, easy-to-operate controls, it seems particularly well suited to PRS, tactical shooting and, more generally, medium- to long-range precision shooting.
The MAR-202 also fits this philosophy very well. Personally, it is one of the features I appreciate most: once your holds are known, its layout makes it possible to move quickly from one distance to another using the reticle directly, without having to dial the turrets every time.
The trade-off is obvious: around 1.3 kg ready to use with its rings is not insignificant. But criticising it for that would almost amount to criticising it for not being something it was never designed to be. On a platform intended for PRS or supported medium- to long-range shooting, that weight seems far less problematic to me than it would be on a rifle intended to be carried all day.
Ultimately, I see this Stalker ED 5-25×56 less as a simple general-purpose scope and more as a clearly specialised optic. It combines practically all the features now expected from a scope aimed at PRS or long-range tactical shooting, with image quality that, at my level, shows no shortcomings that are genuinely limiting in use.
More information here https://marcooloptics.com/product/stalker-ed-5-25×56-ffp-ir-scope-prs/
Pros
- ED glass
- Highly versatile 5-25× magnification range
- MAR-202 FFP Christmas-tree reticle
- Generous adjustment range: 35 MIL elevation / 22 MIL windage
- Large turrets with dual numbering
- Zero Stop
- Ergonomics particularly well suited to PRS and tactical shooting
Cons
- Large and bulky overall package
- Approximately 1,300 g ready to use with the rings
- Not well suited to a platform where weight and compactness are priorities