Kahles 3.5-18x50 K 318i Riflescope (MSR Reticle, Left-Side Windage Turret)

BH #KA3518X50L • MFR #10653
Kahles 3.5-18x50 K 318i Riflescope (MSR Reticle, Left-Side Windage Turret)
Key Features
  • First Focal Plane MSR Reticle
  • Adjustable Partial Reticle Illumination
  • 34mm Diameter Maintube
  • 0.1 MIL Impact Point Correction
The Kahles 3.5-18x50 K 318i Riflescope is built to deliver precise performance packed into a compact form factor, providing tactical and long-distance shooters an invaluable optic to give them the confidence to take even the most challenging shots.
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Kahles K318i Overview

  • 1Description
  • 2Optical Performance
  • 3MSR Reticle
  • 4Turret Details
  • 5Use and Handling
  • 6Construction

The Kahles 3.5-18x50 K 318i Riflescope is built to deliver precise performance packed into a compact form factor, providing tactical and long-distance shooters an invaluable optic to give them the confidence to take even the most challenging shots.

Its broad magnification range allows you to scan the terrain for targets on low power then dial it up to make a positive identification and take the shot. To add even more precision, the partially-illuminated reticle is placed on the first focal plane, so the subtensions remain accurate at all magnifications, and the thin hairs are illuminated to make it easier to see in low or challenging light.

Shot corrections are made at 0.1 MIL per turret click with a broad 30 MIL elevation range to provide long-distance shooters the adjustments they need. To make room for the illumination rheostat, Kahles integrates the parallax adjustment into the elevation turret, with a left-side windage turret that makes it easier to reach for those who shoot right-handed. These tactical turrets are exposed and finger-adjustable to make fast corrections in the field, and the Allen key required to zero the riflescope is safely stowed in the illumination turret cap so there's no need to carry extra tools.

Designed to withstand the heavy recoils of the large-caliber rifles used in long-range hunting shooting, and to provide the space required for the wide elevation adjustment range, the K318i is built with a robust 34mm one-piece maintube made of lightweight and durable aluminum treated with a scratch-resistant anodized finish. The housing is nitrogen-filled and O-ring sealed to make it waterproof and resistant to internal fogging in extreme weather conditions and temperatures. Protecting the scope is a neoprene pull-over cover that not only buffers impacts and hits but keeps the lenses clean and clear.

Optical Performance

  • Broad 3.5-18x zoom range allows users to scan the landscape for targets on low power, then increase magnification for close-up observation and identification
  • Large 50mm objective lens draws in the light required to ensure views remain bright and clear in low or challenging light, and when targeting at extremely long range on maximum magnification
  • 27.8-foot field of view at 100 yards on 3.5x, 5.5 feet on 18x

MSR Reticle

  • First focal plane placement retains accurate reticle subtensions at all magnification to improve accuracy
  • Modified ranging duplex crosshair design
  • Illuminated center aiming cross improves sighting in low and challenging light
  • Long thick outer posts on horizontal and upper vertical axes
  • Thin center hairs with extended hair on lower vertical axis
  • Hash marks and stadia lines on hairs provide hold-over/under and wind adjustments
  • Extended markings on lower vertical hair aid in long-range ballisitic drop
  • Inverted "L" and graduated scale help estimate range to and size of a target in-view for faster shot adjustment and improved accuracy
  • Etched on glass for permanence without the possibility of shifting over time
  • Variable reticle brightness enables precise brightness based on personal preference or situation
  • Runs on one included CR2032 battery

Turret Details

  • Precise 0.1 MIL impact point correction
  • Wide 30 MIL elevation adjustment range is optimized for long ranges
  • 20 MIL windage adjustment range
  • Finger-adjustable exposed turrets for fast adjustments in the field, left-side windage turret
  • TWIST GUARD windage turret has freely rotating end cover that prevents accidental adjustments
  • Graduated elevation turret with a bright red button and a second rotation indicator
  • Space-saving parallax adjustment collar on the base of the elevation turret enables fast correction without the need for another turret
  • Dedicated illumination control turret with variable intensity rheostat for precise reticle brightness

Use and Handling

  • Fast focus eyepiece with an integrated throw lever for fast zooming in any weather or while wearing gloves
  • +2.5 to -3.5 diopter range
  • 3.6" eye relief presents a generous eye box allowing more flexibility for mounting, and more space to accommodate high-caliber recoil
  • Wide 6.9mm exit pupil at 3.5x is ideal for use in low-light when the pupil is open and fully dilated


  • Ultra-short housing design provides long-distance shooting performance without being bulky or cumbersome, making it ideal for tactical use
  • Robust 34mm single-piece maintube allows full light throughput from the large objective while providing the strength required to hold up to the heavy recoils from high-caliber rifles used in long-range shooting/hunting
  • Lightweight and strong aluminum housing
  • Matte black anodized finish reduces glare and blends with all environments
  • Nitrogen-filled and O-ring sealed to make the riflescope waterproof and resistant to internal fogging in extreme conditions
  • Neoprene cover protects entire riflescope from snags, hits, and impacts while keeping the lenses clean and clear
  • Allen key for zeroing the turrets is stowed in the cap of the illumination control dial turret
UPC: 708026106538

Kahles K318i Specs

Magnification3.5 to 18x
Objective Lens Diameter50 mm
Field of View3.5x: 27.8' @ 100 yd / 9.3 m @ 100 m
18x: 5.5' @ 100 yd / 1.8 m @ 100 m
Exit Pupil Diameter3.5x: 6.9 mm
18x: 2.8 mm
Eye Relief3.6" / 92 mm
Diopter Correction-3.5 to +2.5
Reticle TypeMSR/Ki Reticle (First Focal Plane)
IlluminationPartially Illuminated
Illumination TypeLED
Illuminated ColorRed
Filter ThreadM52 x 0.75
Impact Point Correction0.1 MIL per Click
Windage Adjustment20 MIL
Elevation Adjustment30 MIL
Parallax CorrectionYes, 82' / 25 m to Infinity
Water ResistanceWaterproof
FogproofYes, Nitrogen Filled
Maintube Diameter34 mm
Battery1 x CR2032
DimensionsLength: 12.3" / 31.3 cm
Height: 3.2" / 81 mm
Objective Diameter: 2.2" / 56 mm
Weight33.2 oz / 940 g
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