The SIG Sauer ROMEO5 Gen II green-dot is a compact, durable 1x20 carbine optic for fast target acquisition — here with a high-visibility green 2 MOA dot that many shooters find easier to pick up in bright daylight. It's a great-value, dependable dot for AR-15s and carbines.
SIG's MOTAC motion-activated illumination keeps the dot ready and delivers up to 50,000 hours on a CR2032, with day and night-vision settings. It ships with both a low mount and an absolute co-witness riser, and is IPX7 sealed.
How It Compares
Prefer red, or a dual reticle? See the standard ROMEO5 in the SIG ROMEO range, or the ROMEO5XDR Gen II (selectable dot/circle-dot). Add reach with a magnifier. Browse all rifle red dots and build via AR-15 optics; read our SIG ROMEO guide.
Ideal For
- AR-15s and carbines
- Home defence and range use
- Shooters who prefer a green dot
Key Features
- 2 MOA green dot; high daylight visibility
- MOTAC motion-activated illumination
- Day + night-vision settings; up to 50,000 h on CR2032
- Low mount + absolute co-witness riser included
- Aluminium housing, IPX7, shock/fog-proof
Technical Specifications
| Magnification |
1x |
| Objective |
20 mm |
| Reticle |
2 MOA dot (green) |
| Click Value |
0.5 MOA |
| Adjustment Range |
100 MOA W&E |
| Battery |
CR2032 (up to 50,000 h), MOTAC |
| Mount |
Picatinny — low + riser included |
| Waterproof |
IPX7 |
| Weight |
5.1 oz |
| Warranty |
SIG Infinite Guarantee |
What's Included
- SIG ROMEO5 Gen II green dot
- Low mount, riser (absolute co-witness), CR2032 battery, lens covers, 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
Green or red?
Many shooters find green appears brighter in daylight; otherwise it's the same ROMEO5 Gen II optic.
Does it co-witness on an AR-15?
Yes — it ships with both a low mount and an absolute co-witness riser.
What battery does it use?
A single CR2032, up to 50,000 hours with MOTAC.
