What is the difference between the Sig sor52001 and sor52010?

That is a darn good question. I poked around Sig's site and my answer would be "almost nothing" - except for the "tread" printing on the riser mount. Everything else seems to be identical. I do own both and the first 52010 I bought from Amazon a couple weeks ago was DOA as the dot was not connected to the adjuster screws. I got another one and no issue. I think you're safe either way.

Will this see infrared light ?

According to the Sig Manual it states that it has 8 daytime and 2 NV (night vision) settings. So in theory it should. I, however have not tried it, since I do not own any infrared equip. lights etc.

What's the difference between the sig sauer red dot romeo 5 and the romeo 5 tread?

The difference is just the TREAD Branding. This is an accessory branded optics for The Sig Sauer M400 TREAD aluminum frame rifle. Refer to https://www.sigsauer.com/store/sigm400-tread.html for more information.

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SIG SAUER Romeo5 1x20mm Tread Closed Red Dot Sight | High-Performance Durable Waterproof Fog-Proof Compact 2 MOA Red Dot Sight for SIG M400 Tread

SIG SAUER Romeo5 1x20mm Tread Closed Red Dot Sight | High-Performance Durable Waterproof Fog-Proof Compact 2 MOA Red Dot Sight for SIG M400 Tread

Product ID: 690745436

Details

Brand
Sig Sauer
Color
Black
Compatible Devices
Handgun
Item Weight
0.44 Pounds
Magnification Maximum
1 x
Magnification Minimum
1 x

🎯2 MOA ultra-precise red dot

💧IPX7 waterproof & fog-proof

🔋40,000+ hrs MOTAC battery life

£219.95

Duties & taxes included

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Description

🎯 Lock on fast, stay ahead always.

PINPOINT PRECISION - 2 MOA red dot with ultra-low parallax ensures your aim is always true, no matter the angle.
OPTIMIZED VISIBILITY - 10 illumination settings (8 daylight + 2 NV) guarantee clear sight in any lighting condition.
ALL WEATHER DURABILITY - IPX7 waterproof and fog-proof design means this sight performs flawlessly rain or shine.
SEAMLESS COMPATIBILITY - Includes M1913 Picatinny low mount and 1.41" riser for versatile mounting on SIG M400 Tread and more.
SMART POWER EFFICIENCY - Motion Activated Illumination (MOTAC) extends battery life beyond 40,000 hours—ready when you are.

The SIG SAUER Romeo5 1x20mm Tread Red Dot Sight is a compact, high-performance optic engineered for rapid target acquisition with a precise 2 MOA red dot. Featuring ultra-low parallax, unlimited eye relief, and 10 illumination settings, it adapts seamlessly to all lighting conditions. Its rugged IPX7 waterproof and fog-proof aluminum body ensures durability in any environment, while MOTAC technology maximizes battery life beyond 40,000 hours. Designed specifically for the SIG M400 Tread, it includes versatile Picatinny and riser mounts for quick, secure installation.

Specifications

ASIN	B07KYWR1RN
Aiming Scope Sight Pin Size	2 Inches
Best Sellers Rank	#72,042 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #148 in Gun Sights
Brand	Sig Sauer
Brand Name	Sig Sauer
Color	Black
Compatible Devices	Handgun
Customer Reviews	4.7 out of 5 stars 1,921 Reviews
Included Components	Sig
Item Display Weight	7 ounces
Item Type Name	Romeo5 1x20mm Compact Red Dot
Item Weight	0.44 Pounds
Lens Color	Red
Magnification Maximum	1 x
Magnification Minimum	1 x
Manufacturer	Sig Sauer
Manufacturer Part Number	SOR52010
Material	Aluminum
Material Type	Aluminum
Model Name	SOR52010
Model Number	SOR52010
Mounting Type	Picatinny Mount, Riser Mount
Night vision	No
Objective Lens Diameter	2E+1 Millimeters
Product Style	Compact
Reticle Type	Red Dot
Sport	Airsoft, Hunting, Tactical & Military
Sport Type	Airsoft, Hunting, Tactical & Military
Style	Compact
Thread Type	UNC
UPC	798681599028
Unit Count	1.0 Count

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