SIG Sauer Optics
SIG Sauer ROMEO4
Specs, variants & prices
SIG Sauer currently makes 10 versions of the ROMEO4 optic. Magnification is 1x on each version. SIG Sauer's suggested retail prices run from $294.99 to $599.99, and stores set their own prices from there. The table below lines up every version so you can compare them at a glance.
What versions of the SIG Sauer ROMEO4 are there?
10 current versions. Specs and measurements are SIG Sauer's own.
ROMEO4H 1x20MM — 2 MOA Red Dot Ballistic Circle Dot
—- Model / part #
- SOR43011
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- 2 MOA Red Dot Ballistic Circle Dot
- Weight
- 7.6 oz
- Finish
- Graphite
- Details
- Height: 63.5 mm · Length: 86 mm · Battery: (1) CR2032
- MSRP
- $379.99
ROMEO4H 1x20MM — Ballistic Circle Quadplex
—- Model / part #
- SOR43012
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- Ballistic Circle Quadplex
- Weight
- 7.6 oz
- Finish
- Graphite
- Details
- Height: 63.5 mm · Length: 86 mm · Battery: (1) CR2032
- MSRP
- $294.99
ROMEO4H 1x20MM — Green Horse Shoe Ballistic Dot
—- Model / part #
- SOR43013
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- Green Horse Shoe Ballistic Dot
- Weight
- 7.6 oz
- Finish
- Graphite
- Details
- Height: 63.5 mm · Length: 86 mm · Battery: (1) CR2032
- MSRP
- $389.99
ROMEO4T 1x20MM — 1 MOA Ballistic CirclePlex
—- Model / part #
- SOR43032
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- 1 MOA Ballistic CirclePlex
- Weight
- 7.6 oz
- Finish
- Black
- Details
- Waterproof: IPX-7 · Height: 63.5 mm · Length: 85.5 mm · Battery: (1) CR2032
- MSRP
- $429.99
ROMEO4T 1x20MM — 2 MOA Red Dot Ballistic Circle Dot (SOR43031)
—- Model / part #
- SOR43031
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- 2 MOA Red Dot Ballistic Circle Dot
- Weight
- 7.6 oz
- Finish
- Black
- Details
- Waterproof: IPX-7 · Height: 63.5 mm · Length: 85.5 mm · Battery: (1) CR2032
- MSRP
- $529.99
ROMEO4T 1x20MM — 2 MOA Red Dot Ballistic Circle Dot (SOR43131)
—- Model / part #
- SOR43131
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- 2 MOA Red Dot Ballistic Circle Dot
- Weight
- 7.6 oz
- Finish
- Flat Dark Earth (FDE)
- Details
- Waterproof: IPX-7 · Height: 63.5 mm · Length: 85.5 mm · Battery: (1) CR2032
- MSRP
- $549.99
ROMEO4T-PRO 1x20MM
- Model / part #
- SOR44101
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- —
- Weight
- 6.3 oz
- Finish
- Black
- Details
- Height: 62.5 mm · Length: 67.5 mm · Battery: (1) CR2032
- MSRP
- $549.99
ROMEO4T-PRO 1x20MM — Flat Dark Earth (FDE)
- Model / part #
- SOR44102
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- —
- Weight
- 6.3 oz
- Finish
- Flat Dark Earth (FDE)
- Details
- Height: 62.5 mm · Length: 67.5 mm · Battery: (1) CR2032
- MSRP
- $569.99
ROMEO4XT-PRO RED DOT SIGHT, BALLISTIC CIRCLE DOT, 0.5 MOA ADJ, AAA, HEX BOLT MOUNT, SPACER, BLACK
- Model / part #
- SOR44001
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- Ballistic Circle Dot
- Weight
- 7.4 oz
- Finish
- Black
- Details
- Adjustment: 0.5 MOA · Length: 77 mm · Height: 56 mm · Battery: (1) AAA
- MSRP
- $579.99
ROMEO4XT-PRO RED DOT SIGHT, BALLISTIC CIRCLE DOT, 0.5 MOA ADJ, AAA, HEX BOLT MOUNT, SPACER, FDE
- Model / part #
- SOR44002
- Magnification
- 1x
- Objective
- 20 mm
- Reticle
- Ballistic Circle Dot
- Weight
- 7.4 oz
- Finish
- Flat Dark Earth (FDE)
- Details
- Adjustment: 0.5 MOA · Length: 77 mm · Height: 56 mm · Battery: (1) AAA
- MSRP
- $599.99
How much does a SIG Sauer ROMEO4 cost?
SIG Sauer's suggested retail prices run from $294.99 to $599.99, depending on the version. Tap “See prices” next to any version to see what retailers are asking.
Can you buy one in California or Massachusetts?
SIG Sauer leaves California and Massachusetts blank for this product. Some states limit which accessories a dealer can sell. State rules change, so check our California and Massachusetts pages before you buy.
What's the latest on the ROMEO4?
Nothing new on the ROMEO4 lately.
Specs from SIG Sauer, checked July 24, 2025 (source). SIG Sauer's site blocks scripted requests, so this table was read from a saved copy of the product page. A few UPCs come from retailer listings, since SIG Sauer doesn't publish them for every version. Spot a mistake? Let us know and we'll fix it. SIG Sauer is a trademark of its owner, listed for identification only. Firearms Almanac isn't affiliated with SIG Sauer.