Click to see full view
Sig Sauer
Overview
The Sig Sauer Romeo MSR Red Dot Gen II Optic is designed to provide a precise 2 MOA dot for quick target acquisition, making it ideal for both close-quarters and mid-range shooting. It features a Picatinny mounting interface, ensuring compatibility with a wide range of firearms and accessories. This optic is commonly found in multi-caliber builds, enhancing versatility and performance across different platforms.
Specifications
Available Merchants(9)
Prices checked
Price Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the SIG Sauer Romeo MSR Red Dot Gen II Optic - SORMSR101 to a build in June 2026.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 7 of the 9 retailers we track have it in stock. The best price drifted down from $109.99 to $102.04 over October 2026 without a real sale. Buying today, the lowest price is $85 at BattleHawk Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which optic to pick?
We ranked every optic by how often it shows up in real builds on GunPartPicker.
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
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Rise Armament Super Sporting AR15/10 Single Stage Trigger - Flat - Dtom Special Edition
Hogue OverMolded Rifle Grip, Beavertail, Finger Grooves, Fits AR Rifles, Slate Gray
Phase 5 Tactical Extended Ambidextrous Bolt Release V3 - Red Cerakote
Strike Industries Cobra Billet Aluminum Trigger Guard - Red
SB Tactical SBA3 5 Position Adjustable Arm Brace Buffer Tube Not Included, Black - SBA3X-01-SB
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.
No reviews yet. Be the first to review this product!