KAHLES K540i REFINED 5-40x56i Riflescope

Unparalleled Performance

Designed specifically for professional long-range shooting, the K540i REFINED takes the proven KAHLES competition philosophy and pushes it further.

At its core is an exceptional combination of:

✔ True 8x zoom

✔ 5-40x magnification

✔ Revolutionary VISIONFLEX optical design

✔ Exceptionally wide field of view

✔ Generous eyebox

✔ Competition-focused ergonomics

✔ First Focal Plane precision

The result is an optic designed not simply for maximum magnification, but for providing the shooter with more usable visual information and greater control throughout a stage.

KAHLES specifically developed the K540i for shooters operating in fast-paced long-range environments where target acquisition, transitions and situational awareness are every bit as important as ultimate precision.

True 8x Zoom – 5-40x Magnification

The K540i REFINED offers a huge:

5-40x Magnification Range

Its true 8x zoom ratio provides exceptional versatility across a wide range of shooting distances.

Benefits include:

✔ Fast target acquisition at lower magnification

✔ Excellent target identification

✔ Precise aiming at extended distances

✔ Greater flexibility across changing stage layouts

✔ Outstanding long-range capability

✔ 40x maximum magnification for detailed target observation

Rather than simply chasing maximum magnification, KAHLES has engineered the optical system to maintain performance throughout the entire adjustment range.

VISIONFLEX Optical System

One of the defining technologies of the K540i is:

KAHLES VISIONFLEX

VISIONFLEX is a revolutionary optical design developed to provide both an exceptionally wide field of view and a remarkably generous eyebox.

The K540i REFINED delivers a field of view of:

10.2 – 1.3 metres at 100 metres

KAHLES states that VISIONFLEX provides a 40% wider field of view at 25x compared with the 2025 K525i.

Benefits include:

✔ Greater situational awareness

✔ Faster target acquisition

✔ Easier target transitions

✔ Improved visibility around the target

✔ More forgiving head positioning

✔ Greater comfort during complex shooting positions

For PRS and other dynamic precision rifle disciplines, that additional field of view can be a major advantage when transitioning between multiple targets.

Exceptionally Generous Eyebox

High-magnification competition scopes can become unforgiving as magnification increases.

The K540i REFINED has been engineered specifically to address this.

VISIONFLEX combines its wide field of view with a generous eyebox, helping the shooter maintain a usable sight picture when shooting from compromised positions.

Benefits include:

✔ Faster sight picture acquisition

✔ Greater tolerance of imperfect head position

✔ Improved barricade shooting

✔ Easier positional shooting

✔ Reduced time spent searching for the full image

This is particularly valuable in PRS-style competition where perfect rifle position is rarely guaranteed.

First Focal Plane Precision

The K540i REFINED features a:

First Focal Plane Reticle

Benefits include:

✔ Consistent subtensions throughout the magnification range

✔ Accurate holdovers at any magnification

✔ Reliable wind holds

✔ Fast corrections

✔ Professional competition functionality

Multiple reticle configurations are available, allowing shooters to select the option best suited to their preferred shooting style.

REFINED Turret System

The latest REFINED configuration introduces competition-focused improvements to the K540i control system.

10 MIL Per Revolution

Both elevation and windage use clearly defined:

0.1 MRAD clicks

with:

100 clicks / 10 MIL per revolution

Benefits include:

✔ Simple revolution management

✔ Fast corrections

✔ Easy-to-read adjustment values

✔ Precise 0.1 MRAD adjustment

✔ Intuitive competition operation

The REFINED version also increases the usable windage capability to 10 MIL, improving flexibility in dynamic long-range environments.

Top-Mounted Parallax

One of KAHLES’ signature competition features is its:

Top-Mounted Parallax Adjustment

Rather than placing the parallax control conventionally on the side of the scope, KAHLES integrates it into the elevation turret assembly.

Benefits include:

✔ Easy access from either side of the rifle

✔ Minimal hand movement

✔ Excellent positional shooting ergonomics

✔ Faster adjustment during competition

✔ Clean control layout

Parallax adjustment extends from:

20 metres to infinity.

Left or Right-Side Windage Options

KAHLES understands that shooter ergonomics are personal.

The K540i REFINED is therefore available with:

Left-Side or Right-Side Windage

This allows shooters to select the configuration that best complements their shooting position and preferred method of operating the rifle.

Combined with the centrally positioned parallax system, this creates one of the most shooter-focused control layouts available on a competition riflescope.

EASYREAD

The K540i REFINED features KAHLES:

EASYREAD

Designed to make turret information fast and intuitive to interpret during competition.

Benefits include:

✔ Clear turret markings

✔ Faster visual confirmation

✔ Reduced adjustment errors

✔ Improved operation under time pressure

✔ Competition-focused ergonomics

When seconds matter, being able to immediately recognise your turret position becomes a genuine performance advantage.

REVOLUTION INDICATOR

The integrated:

REVOLUTION INDICATOR

provides clear awareness of the elevation turret’s current revolution.

Benefits include:

✔ Reduced risk of revolution errors

✔ Faster turret confirmation

✔ Greater confidence when dialing

✔ Improved long-range operation

✔ Particularly valuable during multi-distance stages

The system works alongside EASYREAD to make elevation management intuitive and easy to verify.

INDEXSTOP

KAHLES’ proven:

INDEXSTOP

provides a reliable reference point for returning the elevation turret to the established zero.

Benefits include:

✔ Fast return to zero

✔ Positive reference point

✔ Reduced dialing errors

✔ Simple operation

✔ Proven competition functionality

For shooters frequently moving between dramatically different target distances, a dependable zero-stop system is essential.

TWISTGUARD

The K540i REFINED also incorporates:

TWISTGUARD

Designed to reduce the likelihood of unintended windage adjustment without requiring a conventional locking mechanism.

Benefits include:

✔ Protection against accidental adjustment

✔ Immediate turret access

✔ No separate locking operation

✔ Fast competition use

✔ Clean ergonomic design

This allows the windage turret to remain immediately accessible while helping protect the shooter’s established setting.

Illuminated Reticle

The K540i REFINED features an illuminated First Focal Plane reticle.

Benefits include:

✔ Improved reticle visibility

✔ Better contrast against difficult backgrounds

✔ Useful in changing light conditions

✔ Enhanced target acquisition

✔ Competition and professional versatility

The illumination system is powered by a readily available CR2032 battery.

Massive Internal Adjustment Capability

The K540i REFINED provides substantial internal adjustment for demanding long-range applications.

Elevation Adjustment

2.9m / 100m – approximately 29 MRAD

Windage Adjustment

1.2m / 100m – approximately 12 MRAD

Combined with its 0.1 MRAD click value, the K540i provides the adjustment capability required for serious long-range competition and precision rifle shooting.

Built for Competition

The K540i REFINED has been purpose-built around the requirements of serious precision rifle shooters.

Ideal for:

✔ PRS Competition

✔ Precision Rifle Competition

✔ Long-Range Steel Shooting

✔ ELR Shooting

✔ Professional Applications

✔ Advanced Precision Rifle Training

The combination of enormous magnification range, wide field of view and competition-focused controls makes the K540i particularly well suited to dynamic shooting environments.

Key Features

✔ 5-40x magnification

✔ True 8x zoom

✔ 56mm objective lens

✔ First Focal Plane design

✔ Illuminated reticle

✔ VISIONFLEX optical system

✔ Exceptionally wide field of view

✔ Generous eyebox

✔ 0.1 MRAD adjustments

✔ 10 MIL per revolution turrets

✔ 10 MIL usable windage per revolution

✔ Top-mounted parallax

✔ Left or right-side windage configurations available

✔ EASYREAD

✔ REVOLUTION INDICATOR

✔ INDEXSTOP

✔ TWISTGUARD

✔ 36mm main tube

✔ 20m to infinity parallax

✔ Waterproof construction

✔ Designed for professional long-range shooting

Specifications

Specification	Details
Product	KAHLES K540i REFINED
Magnification	5-40x
Objective Lens	56mm
Zoom Ratio	8x
Focal Plane	First Focal Plane
Reticle	Multiple Options Available
Illumination	Yes
Exit Pupil	7.7 – 1.4mm
Eye Relief	92mm
Field of View	10.2 – 1.3m @ 100m
Diopter Compensation	+2 / -3 dpt
Twilight Factor	16.7 – 47.3
Click Value	0.1 MRAD
Clicks Per Revolution	100
Adjustment Per Revolution	10 MRAD
Elevation Adjustment Range	2.9m / 100m
Windage Adjustment Range	1.2m / 100m
Parallax	20m – Infinity
Main Tube Diameter	36mm
Length	409mm
Weight	1,115g
Battery	CR2032
Objective Filter Thread	M58 x 0.75
Waterproof	Yes – ISO 9022-8
Warranty	10 Years

Specifications are based on the current KAHLES K540i REFINED technical data.

Ideal For

Competition

✔ PRS

✔ Precision Rifle Competition

✔ Long-Range Steel

✔ ELR

✔ Field Matches

Professional Applications

✔ Long-Range Precision

✔ Advanced Marksmanship Training

✔ Professional Precision Rifle Systems

Rifle Platforms

✔ Accuracy International AT-X

✔ Accuracy International AXSR

✔ MPA Vanquish

✔ KRG C4

✔ Terminus Zeus

✔ Zermatt Origin

✔ Custom Precision Rifles

What’s in the Box

• KAHLES K540i REFINED 5-40x56i Riflescope

• Battery

• Manufacturer Documentation

• Warranty Information

Optional KAHLES accessories include objective and ocular flip-up covers, 56mm sunshield, 56mm Killflash ARD, K-1 parallax spinner, K-1 throw lever and 36mm bubble level.

Why Buy From Delta Tactical

At Delta Tactical we specialise in premium precision rifle optics and competition rifle systems.

When you purchase from us you receive:

✔ Genuine KAHLES products

✔ Expert long-range and competition shooting advice

✔ Professional optic setup support

✔ Fast Australian shipping

✔ Local after-sales support

✔ Real-world precision shooting experience

Is the K540i REFINED Right for You?

Choose the K540i REFINED if:

✔ PRS or precision rifle competition is your primary discipline

✔ You want an exceptionally wide field of view

✔ You value a generous eyebox for positional shooting

✔ You want maximum magnification without sacrificing low-end usability

✔ You prefer competition-focused turret ergonomics

✔ You regularly transition between multiple targets

✔ You want left or right-side windage configuration options

✔ You demand a premium European competition optic

The KAHLES K540i REFINED stands apart because it doesn’t simply provide more magnification. Its combination of 5-40x true 8x zoom, VISIONFLEX optics, exceptionally wide field of view and competition-specific ergonomics is designed to help the shooter see more, transition faster and maintain a usable sight picture through difficult shooting positions.

The KAHLES K540i REFINED 5-40x56i is a purpose-built competition optic for shooters who demand maximum visibility, intuitive control and exceptional optical performance. Its VISIONFLEX optical system, huge 5-40x magnification range, remarkably wide field of view and shooter-focused control layout make it one of the most advanced precision rifle competition scopes in the KAHLES line-up.

For serious PRS and long-range shooters looking for a flagship optic where field of view, eyebox, magnification and ergonomics work together rather than being treated as separate features, the K540i REFINED is an exceptional choice.