SIG SauerRed Dot Sight
SIG Sauer ROMEO4T-PRO Red Dot Sight Ballistic Circle Dot Black
- Reticle
- Ballistic Circle Dot (red), 2 MOA centre dot
- Illumination
- 9 daylight / 3 night-vision settings
- Turrets
- 0.5 MOA per click; 100 MOA elevation and 100 MOA windage
- Electronics
- AAA cell, up to 50,000 hours
In stock — 7–10 business day delivery
Tracked delivery, estimated 7–10 working days
Want to know when it's back? Email us and we'll let you know
Multi-buy savings
Mix any optics and lights — applied automatically
- 5%2 items
- 10%3 items
- 15%4 or more
Applied automatically at checkout — no code needed. Accessories such as tailcaps, switches and mounts aren't included.
Complete your setup
- Shipped from the UK with tracked delivery
- 30-day returns on unused items
- Warranty support — contact us first
Delivery
Every order is shipped from the UK with tracked delivery. Estimated delivery time is 7–10 working days, and you will receive tracking details by email as soon as your order is on its way.
Returns
Unused items in their original packaging can be returned within 30 days. Email info@opticstrader.co.uk first and we will confirm the return details.
Warranty
Every product is new and boxed. If anything goes wrong, contact us first and we'll help with a manufacturer warranty claim where one applies.
The SIG Sauer ROMEO4T-PRO Red Dot Sight is a 1x (non-magnified) enclosed red dot sight with a 20 mm objective lens, a red Ballistic Circle Dot reticle built around a 2 MOA centre dot, running from a single AAA cell for up to 50,000 hours. It weighs 7.4 oz (210 g).
Weight is the reason to choose the PRO over the standard ROMEO4T: at 7.4 oz with a 20 mm objective it is far lighter than the 38 mm-aperture ROMEO4T, and it takes an ordinary AAA cell rather than a coin cell. The reticle is parallax free with unlimited eye relief, and it mounts on a Picatinny hex bolt and spacer system.
Finish: Black — also sold as the ROMEO4T-PRO red dot sight in FDE.
How it compares
Want the larger 38 mm window and solar power? The ROMEO4T is the bigger sight. Want a quad-reticle version? The ROMEO4XT-PRO adds more reticle options. Browse the SIG ROMEO range, all enclosed red dot sights and optics for straight-pull rifles.
Ideal for
- Civilian Service Rifle and practical rifle shooting
- Lightweight straight-pull AR-15 builds
- Practical shotgun and 3-Gun stages
- Shooters who prefer an AAA cell to a coin cell
Key features
- Reticle: Ballistic Circle Dot (red), 2 MOA centre dot
- Illumination: 9 daylight / 3 night-vision settings
- Turrets: 0.5 MOA per click; 100 MOA elevation and 100 MOA windage
- Electronics: AAA cell, up to 50,000 hours
- Housing: 7075-T6 aluminium, IPX8
- Weight: 7.4 oz (210 g)
| Magnification | 1× (non-magnified) |
| Objective Lens Diameter | 20 mm |
| Reticle | Ballistic Circle Dot (red), 2 MOA centre dot |
| Adjustment Increment | 0.5 MOA per click |
| Elevation / Windage Range | 100 MOA / 100 MOA |
| Parallax / Eye Relief | Parallax free / unlimited |
| Illumination Settings | 9 day / 3 night vision |
| Battery | AAA — up to 50,000 hours |
| Housing | 7075-T6 aluminium, IPX8 |
| Finish | Black |
| Weight | 7.4 oz (210 g) |
| Mount | Picatinny (hex bolt and spacer system) |
| SKU / MPN / UPC | SOR44101 / SOR44101 / 798681671397 |
What battery does the SIG Sauer ROMEO4T-PRO use?
The SIG Sauer ROMEO4T-PRO runs on a single AAA cell, rated for up to 50,000 hours.
What is the difference between the SIG Sauer ROMEO4T-PRO and the ROMEO4T?
The SIG Sauer ROMEO4T-PRO has a 20 mm objective and weighs 7.4 oz on an AAA cell, while the ROMEO4T has a larger 38 mm aperture and is solar-assisted with a CR2032.
Is the SIG Sauer ROMEO4T-PRO night-vision compatible?
Yes — the SIG Sauer ROMEO4T-PRO has 9 daylight and 3 night-vision brightness settings.
How is the SIG Sauer ROMEO4T-PRO adjusted for zero?
The SIG Sauer ROMEO4T-PRO adjusts in 0.5 MOA per click, with 100 MOA of elevation and 100 MOA of windage available.
How does the SIG Sauer ROMEO4T-PRO mount?
The SIG Sauer ROMEO4T-PRO fits a Picatinny rail using a hex bolt and spacer system, so height can be set to suit the rifle.
Every order is shipped from the UK with tracked delivery, with an estimated delivery time of 7–10 working days. Unused items in their original packaging can be returned within 30 days for a full refund.