The SIG Sauer JULIET3 is a full-size 3x flip-to-side magnifier that extends the effective range of any red dot sight, then swings aside in an instant for a clean 1x view. It's a proven, no-fuss upgrade for an existing red dot setup.
The push-button quick-detach mount makes transitions fast and one-handed, and an adjustable diopter dials the view sharp. The aluminium housing is IPX7-rated, fogproof and shockproof, and it ships with a spacer for absolute or lower-1/3 co-witness height.
How It Compares
Want more magnification? See the JULIET6 (6x) or the JULIET4 (4x). Browse all red dot sight magnifiers and build via AR-15 optics. Not sure which magnification? Read our magnifier guide.
Ideal For
- Extending the range of a red dot sight
- AR/MSR rifles and carbines
- Fast 1x ↔ 3x transitions
Key Features
- 3x magnification; full-size design
- Push-button flip-to-side QD mount
- Adjustable diopter; absolute & lower-1/3 co-witness
- Aluminium housing; IPX7, fogproof, shockproof
Technical Specifications
| Magnification |
3x |
| Objective |
24 mm |
| Eye Relief |
2.5 in |
| Field of View |
7.4° |
| Mount |
Flip-to-side (absolute & lower-1/3) |
| Waterproof |
IPX7 |
| Length / Weight |
4.1 in / 11.8 oz |
| Warranty |
SIG Infinite Guarantee |
What's Included
- SIG JULIET3 3x magnifier
- Flip-to-side mount, co-witness spacer, tools, lens covers, manual
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and SIG's Infinite Guarantee.
Frequently Asked Questions
What does it pair with?
Any red dot sight at a compatible mounting height — it sits behind the dot to add 3x magnification.
Does a magnifier have its own reticle?
No — it magnifies the reticle of the host red dot.
Can I flip it aside?
Yes — the flip-to-side mount swings it out of the way for 1x, or detach it entirely.
