Quick Summary
The Nikko Stirling Mountmaster 3 9×40 PX ADJ Illuminated Reticule Riflescope is a telescopic sight for airgun and rifle use, supplied with mounts. It is listed with a 3 to 9×40 specification, red and green illuminated half mil dot reticle, and an approximate minimum focus of 10 metres on full magnification.
Who It Is Best For
This scope suits shooters who want a variable magnification sight with illuminated reticle options and included mounts. It is especially relevant if you are fitting to an 11mm dovetail setup, and it may appeal to anyone looking for a general purpose scope for modern airguns or .22 rimfires.
What To Know Before You Buy
The scope is described as having mounts for 11mm dovetails, so it is worth checking your rail setup before ordering. The listed tube size is 1 inch and the weight is 570 grams.
Pros: Variable 3 to 9x magnification, illuminated reticle, and mounts are supplied.
Cons: Check compatibility with your rifle or airgun mount setup before buying.
Common Buyer Questions
What magnification does this scope have?
It is listed as 3 to 9×40.
Does it come with mounts?
Yes, mounts are supplied.
What type of reticle does it use?
It has a red and green illuminated half mil dot reticle.
What rail type is it suited to?
It is supplied with mounts to fit 11mm dovetails.
How close can it focus?
The minimum focus is listed as approximately 10 metres on full magnification.
Key Details
| Detail | What it means in use |
|---|---|
| Brand | Nikko Stirling |
| Model | Mountmaster NMMI3940AO |
| Magnification | 3 to 9x |
| Objective size | 40 |
| Reticle | Red and green illuminated half mil dot reticle |
| Mounts | Supplied with mounts for 11mm dovetails |
| Tube size | 1 inch |
| Weight | 570 grams |
| Minimum focus | Approximately 10 metres on full magnification |
Final Buying View
The Nikko Stirling Mountmaster 3 9×40 PX ADJ Illuminated Reticule Riflescope is a straightforward option if you want a variable magnification scope with illumination and included mounts. The key checks are your rail type and whether the 11mm dovetail fit suits your setup. If those details line up, it gives you a clear, practical scope package to consider.





