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Sig Sauer
Overview
The SIG Sauer Romeo4XT PRO is a red dot optic designed for quick target acquisition, featuring a dot size of 50 MOA that provides a clear aiming point for precision shooting. Constructed from durable aluminum, this optic is built to withstand the rigors of use while maintaining a lightweight profile. It is commonly found on carbine builds chambered in 5.56 NATO, making it a popular choice for both tactical applications and competitive shooting.
Specifications
SIG Sauer Romeo4XT PRO MSR Red Dot 1x20mm .50 MOA - SOR44001
Available Merchants(9)
Prices checked
Price Alert
September 2026 on GunPartPicker
SIG Sauer Romeo4XT PRO MSR Red Dot 1x20mm .50 MOA - SOR44001 ranked #86 of the 203 optics builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #124 of the 491 optics builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today all 9 retailers we track have it in stock. It dipped to $427.47 at BattleHawk Armory for a stretch in September 2026, well under its usual $579.99, so sales do come around. Buying today, the lowest price is $579.99 at Sportsman's Guide, above September's low of $427.47, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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BCM Ambidextrous MK2 Medium Latch Charging Handle, Black - Reliable, Smooth Operation - GFH-MK2-MED-AMBI
Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Anodized Black - MK2AL
Surefire Suppressor Adapter Flash Hider 5.56X45MM NATO 12 28 Tpi Steel Black Nitride
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.
Builds Featuring This Part
See all 1 →Builds in the community that include the SIG Sauer Romeo4XT PRO MSR Red Dot 1x20mm .50 MOA - SOR44001
| Build | Parts | Total |
|---|---|---|
 | 28 | $3104.13 |
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