The SIG Sauer ROMEO4XT-PRO is a fully enclosed, tube-style rifle red dot built to the T-series standard — a rugged 7075-T6 aluminium housing, IPX8 waterproofing and a sealed window that shrugs off rain, mud and dust. The 'XT' adds the Quad Ballistic Circle Dot reticle for maximum aiming flexibility.
Switch between a clean 2 MOA dot, a circle-dot and holdover references on the fly. SIG's MOTAC motion activation and a single AAA battery deliver up to 50,000 hours, and it ships with flip covers, an anti-reflection device and a spacer kit for the right co-witness height.
Finish: Black — also available in Flat Dark Earth.
How It Compares
Prefer the standard Ballistic Circle Dot reticle? See the ROMEO4T-PRO. Want a wide-window enclosed optic? The ROMEO8T. Browse the SIG ROMEO range, all enclosed red dot sights and AR-15 optics.
Key Features
- Quad Ballistic Circle Dot reticle (multi-mode)
- Fully enclosed tube-style design
- MOTAC; 9 day / 3 NV settings
- AAA battery, up to 50,000 hours
- 7075-T6 aluminium, IPX8; spacer kit included
Technical Specifications
| Magnification |
1x |
| Objective |
20 mm |
| Reticle |
Quad Ballistic Circle Dot (red), 2 MOA dot |
| Click Value |
0.5 MOA |
| Adjustment Range |
100 MOA W&E |
| Battery |
AAA (up to 50,000 h), MOTAC |
| Housing |
7075-T6 aluminium, IPX8 |
| Finish |
Black |
| Weight |
~7.4 oz |
| MPN / UPC |
SOR44001 / 798681661534 |
| Warranty |
SIG Infinite Guarantee |
What's Included
- SIG ROMEO4XT-PRO red dot sight
- Hex-bolt mount, spacer kit, AAA battery, flip covers, anti-reflection device, tool, 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's the Quad Ballistic Circle Dot reticle?
A multi-mode reticle with a 2 MOA dot plus circle and holdover elements you can switch between for speed or longer-range holds.
4XT-PRO or 4T-PRO?
The XT has the quad reticle; the 4T-PRO uses the standard Ballistic Circle Dot.
What battery does it use?
A single AAA — inexpensive and widely available — for up to 50,000 hours.
