Sig ROMEO 1 PRO: Precision Redefined for Your Pistol or Rifle

The Sig ROMEO1 PRO is a premium open-reflex red dot sight engineered for fast target acquisition, competitive shooting, and tactical performance. Designed to pair seamlessly with Sig’s X-Series pistols like the P320 X5 Legion, as well as modern sporting rifles, the ROMEO1 PRO delivers reliability, clarity, and rugged construction.

How to Turn On ROMEO 1 PRO

“How do I turn on the Sig ROMEO 1 PRO?” It’s easy:

1. Press either brightness button to power on.

2. Use the ▲ or ▼ buttons to adjust brightness across 10 daytime settings and 2 NV-compatible modes.

3. The optic includes MOTAC (Motion Activated Illumination)—it turns on with movement and powers down when idle.

Sig ROMEO 1 vs ROMEO 1 PRO – Key Differences

The ROMEO1 PRO is an upgraded evolution of the original ROMEO1 optic, and the differences matter—especially for serious shooters.

Verdict: If you’re comparing the Sig ROMEO 1 vs ROMEO 1 PRO, the PRO model wins in clarity, durability, and mounting flexibility.

Sig ROMEO 1 PRO Battery – What Powers It?

Wondering “what battery does the Sig ROMEO 1 take?” or how the PRO model differs? Here’s the answer.

• Battery Type: CR1632 (3V Lithium Coin Cell)

• Battery Life: ~20,000+ hours (typical use)

• Battery Access: Top-loading on ROMEO1 PRO (no need to remove the optic)

Note: The Sig ROMEO 1 battery loads from the bottom, requiring optic removal—whereas the ROMEO1 PRO battery access is tool-less and user-friendly.

Where to Buy It Now

If you’re looking for a Sig ROMEO 1 for sale, top vendors include:

• OpticsPlanet

•  Palmetto State Armory

• ArmsandAmmonation

• Sig Sauer Official Store

Sig ROMEO 1 Prices typically range from $319 to $439 depending on availability, mount kits, and battery inclusions. Be sure to check for package deals that bundle the ROMEO1 PRO with Sig X-series pistols like the P320 X5 Legion.

Sig ROMEO 1 PRO Mount Compatibility – What Will It Fit?

One of the strongest features of the ROMEO1 PRO is its mounting versatility.

 Direct Compatibility:

• Sig Sauer P320 X-Series (X5 Legion, AXG, XCompact)

• M17/M18 models (with optic cut)

• Any slide cut for the Leupold DeltaPoint Pro footprint

 With Adapter Plates:

• Glock MOS (w/ DPP plate)

• CZ Shadow 2 OR

• FN 509 Tactical

• Smith & Wesson M&P CORE (w/ DPP adapter)

If you’re wondering “what footprint is the Sig ROMEO 1 PRO?”, it uses the DeltaPoint Pro footprint, which expands its compatibility across dozens of platforms.

Sig ROMEO 1 PRO Review – Field-Tested Performance

In real-world testing, the ROMEO1 PRO delivers:

• Crystal-clear glass with zero distortion

• Rugged aluminum housing that resists drops, recoil, and harsh environments

• Fast dot acquisition (3 MOA dot)

• Waterproof (IPX7) and fogproof construction

• Tool-less battery access – a huge time-saver in the field

📦 What’s Included in the Box

• ROMEO1 PRO Reflex Sight (3 MOA or 6 MOA)

• Protective cover

• CR1632 battery

• Mounting screws

• Instruction manual

Quick Summary: Why Buy the ROMEO1 PRO?

Buy The ROMEO 1 PRO Today

Looking for a red dot that pairs perfectly with your Sig pistol or tactical rifle? The Sig ROMEO1 PRO is the elite-tier upgrade for precision shooters.

Shop verified in-stock listings:

• OpticsPlanet

• ArmsandAmmonation– Sig ROMEO1 PRO for sale

• GunBroker – Auctions and Private Sales