sig romeo 4t 1x20 ballistic circle dot red dot sight

SIG Sauer ROMEO4T Red Dot Sights

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SIG ROMEO4T Red Dot Sights

The SIG ROMEO4T is SIG’s tactical 1×20 mm red dot family. The original 4T is the solar sight: MOTAC, a Ballistic Circle Dot with four aiming pictures, and 100,000-plus hours from solar plus a CR2032. ROMEO4T-PRO is the professional 4T — brightness on top, a dedicated NV override, D.A.R.C. coatings, and a CR2032 SIG rates at 50,000 hours. ROMEO4XT-PRO is the enclosed 4T with a common AAA cell and the same top NV override.

All three share the quad Ballistic Circle Dot: a 2 MOA dot, a 2 MOA / 65 MOA circle-dot, and holdover pictures SIG lists for 5.56 NATO and 7.62×51. The mount is M1913 with a hex-bolt and a lower-1/3 spacer — not a pistol-slide footprint. Confirm the reticle on the sight you receive.

How to choose

Want solar runtime on an open 4T? Start with ROMEO4T in black or FDE. Want top NV override without solar? ROMEO4T-PRO. Want the enclosed housing and an AAA battery? ROMEO4XT-PRO. See also SIG ROMEO red dots and SIG ROMEO5.

Frequently Asked Questions

What is a SIG ROMEO4T?

ROMEO4T is SIG’s tactical 1×20 mm red dot family. The original 4T is solar-powered with MOTAC and a four-picture Ballistic Circle Dot. ROMEO4T-PRO adds top-mounted NV override and a CR2032. ROMEO4XT-PRO is the enclosed housing with an AAA battery.

What is the difference between ROMEO4T, 4T-PRO, and 4XT-PRO?

The original 4T uses solar plus a CR2032 and side brightness. 4T-PRO drops the solar panel, moves brightness to the top with NV override, and keeps a CR2032. 4XT-PRO is enclosed, uses an AAA cell, and keeps the top NV override.

What reticle does the ROMEO4T use?

These sights are Ballistic Circle Dot. You can switch among a 2 MOA dot, a 2 MOA dot with holds, a 2 MOA / 65 MOA circle-dot, and a circle-dot with holds. Confirm the reticle on the sight you receive.

What rail does a ROMEO4T mount to?

These ship with an M1913 Picatinny hex-bolt mount and a lower-1/3 spacer. They are not pistol-slide footprints such as RMSc, PRO, or SIG-LOC.

Does the ROMEO4T-PRO have solar?

No. Solar is on the original ROMEO4T. The PRO runs a CR2032. SIG lists 50,000 hours with MOTAC on the PRO.

Is the ROMEO4XT-PRO enclosed?

Yes. The XT-PRO housing is enclosed and uses an AAA battery. The original 4T and the 4T-PRO are open-front sights.