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Ruger Scope Rings

Ruger 4K 1" Stainless Medium Rifle Scope Mount Ring for KM77,K77,10/22,K1,Redhawk

SINGLE RING - NOT A PAIR. Select quantity 2 to get a pair
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Ruger scope mount rings are supplied as single mount rings - NOT pairs

If you enter quantity 1 when you buy you will buy ONE ring - NOT a pair. For a pair enter 2.  This is because some models (#77s) require different heights front and back.  Others such as 10/22 take the same size.

Please read fitting carefully. Mount returns due to choosing the wrong size are WAY too common - cost us both - and are so easily avoidable! If unsure please ask....Please read the fitting and compatibility info below.

Sizes and fitting:

See table below - the "K" stainless series are ideal for the Single Six Hunter, Super Redhawk, K1 Stainless, MkII and III pistols, K77, KM77, K77/22. You can also use them with other Ruger models if stainless is the colour you want.

Note - These rings do not fit the American Rimfire. That model has a standard 3/8" dovetail base

Below is a summary. See the charts for more detail or go to or

Height - Ruger use numbers to designate height. This listing if for size 4.
  • 3 = Low = upto 32mm scope lens
  • 4= Medium = upto 42mm scope lens
  • 5= High = upto 52mm scope lens
  • 6 = Extra High = Upto 62mm scope lens
Tube diameter
This is a 1" (25mm)

Material and Finish
Ruger make them in a variety. The ones in this advert are Stainless finish
  • So 4K means it is a is a size 4 Medium - K = Stainless finish - 1"/25mm ring diameter
Popular Ruger model quick guide

K77/22, 10/22 and most models - use same size front and rear mount.

For #77 models -
  • 1" scope upto 32mm lens - Front ring 3K and rear ring 4K
  • 1" scope upto 42mm lens - Front ring 4K and rear ring 5K
  • 1" scope upto 52mm lens - Front ring 5K and rear ring 6K 
  • 30mm scope upto 42mm lens - Front ring 4K30 and rear ring 5K30
  • 30mm scope upto 52mm lens - Front ring 5K30 and rear ring 6K30
  • Scopes over 52mm lens are not recommended for the #77 range

  • SINGLE Medium RING
  • Item No: 4K
  • MFG Model No: 90282
  • Finish: Stainless
  • Accepts scopes with upto 42mm objective lens diameter and 1" tube diameter
  • Height: 0.435"

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Brand Ruger
Code NW1334
Weight 0.085kg
MPN 90282