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Diamond Long Range

Nikko Stirling Diamond 30mm 10-40x56 LR Illuminated Holdfast Reticle Rifle Scope

Nikko Stirling Diamond 30mm 10-40x56 LR Illuminated Holdfast Reticle Rifle Scope

£399.95 £333.29 (ex. VAT)
Stock Status: In Stock
Lock & Return to zero 1/8 MOA turrets + spare blank turret. Length: 425mm - 16.7" length
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Nikko Stirling Diamond 30mm Side Focus 10-40x56 Long Range Illuminated Red-Green Etched Glass Holdfast Reticle Rifle Scope + Sunshade & 2 Ballistic Turrets
The Nikko Stirling Diamond LR (Long Range) is designed and optimised for long range advanced shooting where accuracy and consistency is critical

Premium grade lenses featuring the latest in optical coatings combined with a 30mm aircraft grade aluminium tube ensure maximum light transmission and clarity. 

2 Interchangeable ballistic turrets with RTZ (Return to Zero) can be customised for specific calibers and precise 1/8 MOA increments ensure every shot is on target - First time, Every time!


Mount rings not included
Requires 30mm ring diameter mounts of high profile to suit whatever base is on the rifle, for example, 9-11mm dovetail, 13mm BSA dovetail, weaver/picatinny or model specific. We can also help with picatinny adapter bases for rifles such as Tikka, SAKO, CZ, Ruger, Remington, Howa, Weatherby, Marlin etc (See Britannia Rails section for many picatinny adapter bases)


  • 30mm aircraft-grade aluminium, one-piece main tube
  • Glass-etched Holdfast reticle
  • Fully multi-coated lens
  • Microlux ETE GEN III glass coatings
  • Zero-stop turrets
  • 1/8 MOA turret adjustments. 40 MOA range for W/E
  • 4” eye relief
Side Parallax Adjustable from 10 Yards to infinity - Optional Sidewheel compatible

A good large size that gives you an excellent wide field of view and makes target acquisition and tracking easy.

Interchangeable ballistic turrets with RTZ® (Return to Zero)
Can be customised for specific calibers and precise 1/8 MOA increments (3.5mm at 100m) ensure every shot is on target.

The scope is supplied with 2 Ballistic Drop Turrets:

56mm Objective lens

  • Adjust from 10x up to x40.
  • For FT and medium to longer ranges hunting.
  • Parallax from 10 yards
10-40x Magnification
  • Red and green illumination settings
  • Supplied with 2 ballistic drop turrets
  • Nikko Stirlings’ RTZ (Return to Zero) elevation turret for quick shooting
  • Sunshade included

1. Assembled Ballistic Drop Turret with 1/8 inch indications. (equals app. 1/8 MOA or app. 3.5mm@100m)

2. Extra blank Ballistic Drop Turret for your customized markings of your required distances.

See videos at for more info on the turrets and user manual at

Illuminated Holdfast Reticle - Etched glass with illumination

The Nikko Stirling HOLDFAST reticle has been developed to take longer distance shots quickly by using HOLDFAST lines that match the known point of impact of popular ammunition.

A wide variety of ammunition can be accurately used when you adjust the image size in relation to the HOLDFAST reticle by simply adjusting the Magnification Power.



Benefits of Glass Etched Reticles and Illumination

Glass-etched reticles are way superior to wire for several reasons, most notable is how much more crisp, fine and clean your view is when you look thorough the scope.

A glass etched reticle, also cannot be broken. Anyone who has shot enough has seen a wire reticle actually break within the reticle field. As the reticle design is etched into the reticle lens, it is static and cannot physically be broken.

Glass-etched reticles have the added benefit of zero internal light reflection which occurs to some extent in illuminated scopes with wire reticles.

This superior design requires an additional cost, but even if you don’t plan to use the illumination, the glass-etched reticle is a feature with value to the shooter.

Illumination comes into its own when shooting targets that are either naturally dark or made dark by light conditions such as shadow, dawn dusk, very bright light or night shooting with lamps or night vision kit.

Without Illumination a black reticle can be very hard to make out against the target. Illumination fixes this problem and gives immediate contrast. Adjust intensity according to the light conditions.

Side focus parallax adjustment

Parallax effect is the term that describes the difference in angles between objects that are seen up close and those seen far away. When you look at telephone poles passing by on the side of the road, those closest to your car seem to pass very fast, while the ones far away seem to go very slow. That difference is due to the parallax effect.

The reticle in your scope is like a telephone pole that's very close. If you move your head on the stock while watching the target through the scope the reticle may seem to move, wobble or blur against the target. That affects where you perceive the aim point to be, and that affects your accuracy. Parallax focus correction adjustment reduces this phenomenon to the greatest extent possible.

Parallax focus correction therefore is a must for anyone attempting to use either a high magnification scope, shooting drastically different yardages with the same scope or anyone attempting to shoot at extremely close ranges or extremely long ranges. Especially so if it is a combination of these factors.

This scope features Parallax focus correction by way of the side focus (SF) turret and optional Nikko Diamond LR sidewheel

Technical Specification

  • Parallax: 10 yards/9.1m to inifinity
  • Main tube Diameter: 30mm
  • Reticle : Holdfast (Etched glass)
Illumination : Red and Green - adjusted intensity by side turret (or turn off for black)
  • FOV feet at 100 yards:  2.6 - 10.5
  • FOV m at 100m: 0.9 - 3.5
  • Click Value: 3.5mm at 100m - 1/8 MOA with 40 MOA total range.
  • Eye Relief: 95-105mm / 3.7-4.1"
  • Length: 437mm / 16.7"
  • Weight: 880g / 31oz

Dimensions in cm

  • A - 43
  • B - 18.5
  • C - 8
  • D - 6.2
  • E - 9.8
  • F - 14.4
  • G - 5.6
  • H - 4.3
  • I - 3

  • MPN:
  • EAN:
  • Length:
    425mm - 16.7"
  • Click value:
    1/8 MOA
  • Brand:
    Nikko Stirling
  • Product Code:
  • Weight:
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