Sig Sauer ROMEO4T 1x20mm Ballistic Circle Dot Red Dot Sight, Black

Sig Sauer ROMEO4T 1x20mm Ballistic Circle Dot Red Dot Sight Features and Performance

The Sig Sauer ROMEO4T 1x20mm Ballistic Circle Dot Red Dot Sight is built for shooters who want a compact optic that emphasizes speed, durability, and practical rifle-ready performance. The ROMEO4T line has built a strong reputation among shooters setting up AR-pattern rifles, defensive carbines, and other hard-use platforms because it offers a compact footprint, fast sight acquisition, and a rugged housing suited for demanding field conditions. This specific variant pairs that compact format with a black finish and a ballistic circle dot reticle, making it a strong option for buyers who want a versatile red dot that stays quick up close while still offering a more structured aiming reference than a simple single dot.

This version is identified under part number SOR43031, and multiple matching product listings tie that model directly to UPC 798681567881. Those same listings consistently describe it as the black ROMEO4T with a Ballistic Circle Dot reticle, 1x magnification, and a 20mm objective lens. Keeping those details correct matters because the ROMEO4T family includes nearby variants with different finishes and reticle configurations, and this SKU is specifically the black circle dot model rather than the Flat Dark Earth version or a different reticle option.

The Ballistic Circle Dot reticle gives the shooter a fast and highly visible aiming solution. Matching retailer listings commonly describe it as a 2 MOA dot paired with a 65 MOA circle, which is a familiar format for close-to-moderate range use. That type of reticle is often favored by shooters who want rapid target pickup and intuitive transitions while still maintaining a precise central aiming point for more deliberate shots. On a practical rifle, that makes the optic well suited for defensive use, training, general range work, and other applications where speed and clarity both matter.

Matching listings also reference solar assist, side-mounted battery access, 0.5 MOA adjustment values, unlimited eye relief, and a hex bolt mount with spacer. Some listings also describe the ROMEO4T as having see-through lens covers and a 1.41-inch riser mount with an additional lower one-third co-witness spacer. Together, those details support the ROMEO4T’s reputation as a rugged compact red dot designed for serious use rather than casual range shooting. The side battery layout is especially useful because it allows battery changes without removing the optic, and the included mount system helps it integrate cleanly into modern rifle setups. :contentReference[oaicite:3]{index=3}

If you are building out a complete rifle optic setup, you can browse more options in our
Optics & Optics Accessories
collection. You can also explore additional compatible sighting options in our
Red Dots & Non-Magnified Optics
category.

For manufacturer information and additional product details, visit
SIG SAUER.

• Manufacturer: Sig Sauer
• Model: ROMEO4T
• MPN: SOR43031
• UPC: 798681567881
• Magnification: 1x
• Objective Lens Diameter: 20mm
• Reticle: Ballistic Circle Dot
• Common Retail Reticle Listing: 2 MOA Dot / 65 MOA Circle
• Color: Black
• Adjustment Click Value: 0.5 MOA
• Power Source: Solar and battery
• Battery Access: Side-mounted
• Mount Type: Hex bolt mount with spacer
• Eye Relief: Unlimited