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  • Post last modified:January 20, 2023
sig sauer juliet 4 with romeo 5 red dot

In this Sig Sauer Juliet 4 magnifier review guide, let's take a look at its core specs, glass quality, durability and overall feel.

Let's check it out:

Core Specs

  • Magnification - 4X
  • Objective Lens Diameter - 24mm
  • Eye Relief - 2.55"
  • Mount Type - QD (non 30mm ring)
  • Angular FOV - 6.25 deg
  • Linear FOV - 38.2ft @ 100 yrds
  • Length - 4.2" (Great for shooters like their red dot mounted more forward)
  • Waterproof - IPX8
  • Weight - 12.5 oz


sig juliet 4 unboxing

Sig Sauer ships the Juliet 4X in a very nice packaging. No complaint

Sig Sauer Juliet 4 magnifier unboxing
  • Sig Juliet 4X magnifier (QD Mount included)
  • 2 Riser plates
  • 2 tall screws for riser plate
  • 2 short screws 
  • Diopter lens cap
  • Manual

Initial Impression

sig juliet 4 front lens
sig sauer juliet 4 side view
sig juliet 4 lens cover

This thing is just rock solid. I don't think there is any other high quality 4X red dot magnifier at this price range.

The spring tension on the side flip is sturdy and tight to go on any carbine top rail.

sig juliet 4 magnifier with aimpoint pro
Sig Sauer Juliet 4 magnifier side flip mount

The package comes with 2 riser plates for raising the scope height for better cheek weld position or leave it as is based on the ergonomics of your rifle.

Main Application

Mid - Long Range

sig juliet 4x with eotech 68 moa ring reticle

Paired with EOTECH EXPS3

Better target ID and finer dot aiming placement especially when using a 1 MOA dot. 


aimpoint micro with sig juliet 4 magnifier

Just tuck the magnifier to the side and use the 1X red dot.

The Sig Juliet 4 extends the range for a 1X reflex red dot sight to hit mid targets.

sig juliet 4 on ddm4v11

Improved Zeroing Process

36 yard zero

Finer red dot zero when your reticle is magnified for a better view

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Magnification & Glass Quality

The glass quality is superb. If the red dot sight has tint, then the shooter will see the tint through the glass. If not, then it will be very clear.

Before any magnifier glass review, we always dial the diopter ring first to focus the image relative to the shooter's eyesight. It's an important step to do.

sig juliet 4 diopter ring

The diopter is hidden under the lens cover cap. Just remove it and get access to the ring dial.

sig juliet 4 diopter ring side view
sig Juliet 4X POV

~ 724 ft (241 yard)

The 4X magnification is not much different than a 3X magnifier, and it's is a great tool for positive target identification during the day and night. 

As long as the diopter ring is adjusted relative to the shooter's eye sight, it's good to go!

Eye Relief

sig juliet 4 magnifier eye relief

The eye relief on the Juliet 4 is very flexible but it can be a little better.

Since the 4X Juliet4 is about 4.2", it may not be a good choice for shooters who like to mount their red dot sights more rearward because it pushes the magnifier more back, which will force these shooters to readjust their cheekweld positions.

For those users, we recommend going with a more compact magnifier like the Vortex Micro 3X.

sig sauer juliet 4 pov

The outer body frame obscures lot of the shooter's POV.

Move a bit back, or move a bit forward will not induce too much scope shadow.

holosun hm3x magnifier

Comparing it to Holosun HM3X. Even though it's a 3X but its body frame appears to be very slim behind the optic at a good eye relief distance.

Since it's a magnified optic, the shooter still needs to place the eye inside the eye box, and keep centered as much as possible. Otherwise the scope shadow will occur.

Build Quality

Works with Aimpoint, Trijicon, EOTech, Holosun and many more!

Sig Juliet 4 m1913 qd mount on rail
eotech exps3 with sig juliet 4 tucked away top view

Can be tucked to the right

leupold lco with juliet 4 magnifier tucked away to the left

Can be tucked to the left

cz scorpion with rmr and sig sauer juliet 4
cz scorpion with rmr and sig sauer juliet 4 off to the side

Anyone picks it up will feels like it's an $700 range optic, but it right under $350

The overall size is longer than these popular Micro 3X magnifiers on the marke. 

For some users, the additional 1X increase doesn't make that much difference unless getting into 6X.

QD Mount

Very Rock Solid !

Sig Sauer Juliet 4 QD mount
Sig Sauer Juliet 4 magnifier bottom mounting footprint
Sig Sauer Juliet 4 magnifier side flip mount bottom
Sig Juliet 4 magnifier qd lever locking on rail

The QD throw lever doesn't stick out, so it doesn't interfere with the charging handle grip.

The user can effortlessly grip the charging handle with out bumping into the QD throw lever.

We recommend keeping a good distance between the charging handle grip and the qd lever when it's in the closed position, and use a large size latch charging handle.

You can find more charging handle (AR) options here.

charging handle interferes with qd throw lever

Final Verdict

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  • Best 4X magnifier on the market (Can't find anything else close to this)
  • Extra zoom for zeroing a 1 MOA dot with much finer aim at an effective range
  • Great glass clarity
  • Very slick looking with most red dots
  • Very rock solid QD mount that include dual recoil lug to lock tight on the top rail
  • Mount risers included
  • See through lens cap included


  • Magnification feels similar to a 3X and it has a much longer body
  • May not work well with long length red dots
  • Not compatible with other aftermarket mounts (Doesn't work with Unity Tactical FTC magnifier G33 mount)

Don't like this one?

Check out 6 other new red dot magnifiers here