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Sig Sauer
Overview
The Sig Sauer Romeo5 is a compact red dot sight designed for quick target acquisition, featuring a 2 MOA dot for precise aiming. It utilizes a Picatinny mounting interface, making it easy to attach to your rifle setup. This optic is particularly popular in builds utilizing a mid-length gas system chambered in 5.56 NATO, providing a reliable sighting solution for various shooting scenarios.
SIG Sauer ROMEO5 1x20mm Red Dot Sight, Black - R52001 ranked #32 of the 210 optics builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #27 of the 482 optics builders have added. Builds with this optic are split between 5.56 NATO (58%) and 9mm (17%), split between mid-length (33%) and rifle-length (33%) gas systems, and mostly AR-15 (85%, then AR-9 15%).
It was out of stock everywhere we track for all of August 2026, and today only Sportsman's Guide has it in stock. Buying today, the lowest price is $199.99 at Sportsman's Guide, above August's low of $104.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every optic by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Red Dot & Optic Guide →Check it against the live catalog:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Sig Sauer Romeo5 1x20mm Red Dot Sight, Black - R52001
| Build | Parts | Total |
|---|---|---|
 | 13 | $652.65 |
 | 28 | $2217.93 |
 | 16 | $947.01 |
 | 11 | $1177.91 |
| 20 | $3398.25 |
| 17 | $1543.65 |
1 global rating
Top reviews
Sig Sauer Romeo5 red dot has clear 1x glass. Eye box is tighter than my previous Aimpoint - takes a moment to find the dot when bringing the rifle up at speed. Once on, the 2 MOA dot is crisp. Battery life is excellent.
