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Sig Sauer
Overview
The SIG Sauer ROMEO4XT PRO AR Red Dot is a compact 1x20mm optic designed for quick target acquisition, featuring a precise 0.5 MOA dot size that allows for accurate aiming in various conditions. Its red reticle enhances visibility in bright environments, making it ideal for dynamic shooting scenarios. This red dot sight is frequently found in builds utilizing a mid-length gas system and chambered for 5.56 NATO, providing a reliable setup for both competitive and tactical applications.
Specifications
SIG Sauer ROMEO4XT PRO AR Red Dot 1x20mm 0.5 MOA, FDE - SOR44002
Available Merchants(7)
Prices checked
Price Alert
Build history on GunPartPicker
Builders have been adding the SIG Sauer ROMEO4XT PRO AR Red Dot 1x20mm 0.5 MOA, FDE - SOR44002 to their builds on GunPartPicker since February 2026. All time, it ranks #263 of the 498 optics builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 6 of the 7 retailers we track have it in stock. Prices barely moved in September 2026, holding around $599.99, so there haven't been real sales lately. Buying today, the lowest price is $599.99 at Palmetto State Armory, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Read the guide: AR-15 Red Dot & Optic Guide →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
PSA AR-15 Complete MOE EPT Pistol Lower with SBA3 Brace, FDE - 5165448421
Reptilia Torch 3.7V/18350 M-LOK Left Hand Light Body - 100114
Magpul DT Carbine Stock - Mil-Spec - FDE - MAG1377-FDE
Magpul M-LOK Handstop KIT - Gray
Geissele Automatics AR-15 SSA X Lightning Bow Trigger
Aero Precision AR-15 M4E1-T 14.5" Mid-Length Complete Upper 12" R-One Hg
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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