Holosun HE507C-GR-X2 vs SIG SOR52001
Written by John Wren|
Choose Holosun part HE507C-GR-X2, ASIN B08G6CJL8C, for the green open reflex. The weight cell says 1.44 ounces and the mounting cell says Weaver. A Primary Arms listing says 1.5 ounces, a CR1632, 50,000 hours, an RMR footprint, and no Picatinny mount. Choose SIG part SOR52001, ASIN B01C95I8N4, for the ROMEO5. The weight cell says 145 grams and the material cell says Plastic. SIG's page says 5.1 ounces, a CR2032, 40,000 hours, a low mount, and a 1.41-inch riser. These ASINs are sights. The firearm stays at a licensed dealer.
Key takeaways
- HE507C-GR-X2's weight cell says 1.44 ounces. The mounting cell says Weaver. A dealer listing says the footprint is RMR and no Picatinny mount is included.
- SOR52001's weight cell says 145 grams, about 5.1 ounces, which matches SIG's page. The material cell says Plastic. SIG's page does not.
- Primary Arms says a CR1632 and 50,000 hours for the Holosun. SIG says a CR2032 and 40,000 hours for the ROMEO5. Those are not Amazon cells.
- Neither ASIN is a firearm. This page does not sell a pistol, a rifle, or ammunition.
Buy the Holosun open reflex, manufacturer part HE507C-GR-X2, ASIN B08G6CJL8C, when you want the green 2-MOA dot and 32-MOA circle whose Amazon weight cell says 1.44 ounces and whose mounting cell says Weaver, and when you will check a Holosun dealer before you call that footprint a Picatinny rail. Buy the SIG Sauer ROMEO5, manufacturer part SOR52001, ASIN B01C95I8N4, when you want the 1x20 red dot whose Amazon part cell says SOR52001, whose weight cell says 145 grams, and whose material cell says Plastic, and when you will read SIG's own page before you believe the plastic. The pistol or the rifle stays at a licensed dealer. These two ASINs are sights.
Short version. A Vortex Crossfire II and a Leupold VX-Freedom are magnified scopes, not these 1x dots. Warne 514M and Talley TMS30M are rings for a scope tube, not a mounting plate for an open reflex. A Leupold LensPen and a Celestron LensPen clean glass. They do not aim. A Harris 1A2-BRM and a Magpul M-LOK bipod hold a rifle still. The rifle is still a dealer purchase. This page does not sell one.
| Job | Holosun HE507C-GR-X2 | SIG SOR52001 | Buy |
|---|---|---|---|
| What the card says you are holding | Part HE507C-GR-X2, UPC 810047071280, green circle-dot | Part SOR52001, UPC 798681553396, 2 MOA red dot | Both are sights. Neither ASIN is a firearm. |
| Weight on the Amazon card | 1.44 ounces | 145 grams | 145 grams is about 5.1 ounces. Do not call the Holosun the heavier sight. |
| Mount the cells name | Mounting type says Weaver. Compatible devices says Handgun | Mounting type says Picatinny. The SIG page says an M1913 interface, a low mount, and a 1.41-inch riser | Weaver on an open pistol sight is a cell to distrust until you see the footprint. |
| Material cell | Metal | Plastic | The SIG page describes a metal optic. The Amazon cell says Plastic. Keep both sentences. |
| What a dealer page adds | A Primary Arms listing says 1.5 ounces, 7075-T6 aluminum, a CR1632, 50,000 hours, and an RMR footprint, and it says no Picatinny mount is included | SIG's page says 5.1 ounces, one CR2032, 40,000 hours, 100 MOA of travel each way, and IPX-7 | Those are dealer and manufacturer pages, not Amazon cells. |
Who should buy the Holosun, and who should buy the ROMEO5?
Buy HE507C-GR-X2 if you want the open reflex, the green 2-MOA dot with the 32-MOA circle named in the color cell, the 1.44-ounce weight cell, and the metal material cell, and if you will confirm the footprint on the slide or the plate before you trust a mounting cell that says Weaver. Buy SOR52001 if you want the enclosed 20-millimeter tube, the 2-MOA red dot, the Picatinny cell, and the two mounts SIG says are in the box, and if you will ignore an Amazon material cell that says Plastic once you have the optic in your hand.
Buy neither from this page if you wanted the pistol or the carbine. Those stay at a licensed dealer. Buy neither if you wanted a magnified scope. The Crossfire and the VX-Freedom are that comparison. Buy neither if you wanted the ACSS Vulcan variant of the 507C. That is a different ASIN, with a different reticle, and it is not HE507C-GR-X2.
What is HE507C-GR-X2 actually for?
This card is Holosun part HE507C-GR-X2, ASIN B08G6CJL8C, UPC 810047071280. The color cell says Green 2 MOA Dot and 32 MOA Circle. The style cell says HE507C-GR X2. The weight cell says 1.44 ounces. The material cell says Metal. Magnification minimum and maximum both say 1x. The mounting cell says Weaver Mount. Compatible devices says Handgun. Night vision says Yes. The warranty cell on that scraped specification block says Lifetime. None of those cells prints a battery size, a runtime, or the words RMR.
A Primary Arms listing for the same part number prints a different set. It says 7075-T6 aluminum, 1.5 ounces, a CR1632, 50,000 hours on setting six, 12 brightness settings, a 2-MOA dot with a 32-MOA circle that can be turned off, Shake Awake, a solar panel, an open emitter, and a footprint shared with the Holosun 407C, the 507C, and a Trijicon RMR. It also says the sight does not include a Picatinny rail mount. One and a half ounces against 1.44 ounces is a small disagreement. Weaver against an RMR footprint is not small. If the mounting cell says Weaver and the dealer says there is no Picatinny mount in the box, believe the part you can see, and say which page you used. Do not screw an open reflex to a Weaver rail because a cell used the word Weaver.
The optic is the accessory. The handgun it can sit on is not in this ASIN, and this page does not show one. A plate, if the slide needs one, is a separate part. This card does not print a plate model.
What is SOR52001 actually for?
This card is SIG Sauer part SOR52001, ASIN B01C95I8N4, UPC 798681553396. The reticle cell says 2 MOA Red Dot. The objective cell says 20 millimeters. Magnification says 1x. The weight cell says 145 grams. The material cell says Plastic. The mounting cell says Picatinny Mount. Compatible devices says Handgun. The dimension cell says 2.47 inches long, 1.5 inches wide, and 1.52 inches high. Night vision says Yes. The part number cell says SOR52001.
SIG's own ROMEO5 page for SKU SOR52001 prints 5.1 ounces, a length of 62.7 millimeters, a width of 38.1 millimeters, a height of 38.6 millimeters, one CR2032, 40,000 hours, 8 daytime settings and 2 night-vision settings, 100 MOA of elevation travel, 100 MOA of windage travel, a 2-MOA red dot, IPX-7, an integrated M1913 interface, a low Picatinny mount, and a 1.41-inch co-witness riser. Five and one tenth ounces is 145 grams within ordinary rounding. The weight cell and the SIG page agree. The material cell and the thing SIG sells do not. A plastic cell on a metal optic is an Amazon category error. Do not shop for a plastic ROMEO5 because the cell says Plastic, and do not delete the cell from the record. It is on the card.
The dimension cell, 2.47 by 1.5 by 1.52 inches, is close to SIG's 62.7 by 38.1 by 38.6 millimeters if you convert loosely, and it is not the same sentence. Use SIG's millimeters when you are on SIG's page. Use the inch cell when you are on the Amazon card. A bundle ASIN that adds a paracord bracelet is not SOR52001's own listing. This comparison is B01C95I8N4.
How do you mount either sight without buying a firearm here?
The ROMEO5 card says Picatinny, and SIG says the box includes a low mount and a 1.41-inch riser. That is a rail problem. A rifle with a Picatinny rail can take that mount. The rifle is not an ASIN on this page. The Harris and Magpul bipods are the rest, not the optic. The Warne and Talley rings are for a scope tube. A ROMEO5 is not a 30-millimeter tube, and those rings do not hold it.
The Holosun card says Weaver and Handgun. A dealer page for the same part says the footprint is the 507C / RMR pattern and that no rail mount is included. A handgun that is already cut for that footprint can take the sight. A handgun that is not cut needs a plate the card does not name. Either way the handgun stays at a licensed dealer. This page will not tell you which slide cut you have. Look at the slide.
Glass on either sight is why the LensPen comparison exists. A 2-MOA dot and a circle-dot both disappear under a fingerprint. The pen is not a zero. Neither of these Amazon cards prints a click value. The Primary Arms page says 1/2 MOA for the Holosun. SIG's travel numbers are 100 MOA, not a click value. Do not invent a click from the travel.
What actually fails on these two cards?
The Holosun card fails when Weaver is treated as a rail the sight bolts to. It fails when 1.44 ounces and a dealer's 1.5 ounces are argued as if one of them were a lie rather than two documents. It fails when a CR1632 and 50,000 hours are called Amazon cells. They are on the dealer page. It fails when the ACSS reticle is ordered under HE507C-GR-X2. It fails when a photograph of a pistol is used to sell the sight. This page does not use one.
The ROMEO5 card fails when Plastic is believed over the optic in the box. It fails when 145 grams is converted into a different weight than SIG's 5.1 ounces and then treated as a conflict. It fails when a runtime, a battery, or 100 MOA is called an Amazon cell. Those lines are on SIG's page. It fails when a magnified scope's rings are bought for this tube. It fails when the firearm is added to the cart beside the sight. There is no firearm cart on this page.
What is this comparison not?
This is not a firearm review. There is no firearm ASIN, no ammunition ASIN, and no photograph of either. The dealer sells the gun. This is not a magnified-scope review and it is not a ring review. This is not every Holosun and every SIG dot. HE507C-GR-X2 and SOR52001 are the cards. A red 507C, a Vulcan reticle, and a ROMEO5 bundle with extra parts are other listings. This is not a price quote. The price moves. Use the buttons if you want the live listing. This is not a zeroing guide. Neither card prints a distance.
A zero is still your zero. Neither Amazon card prints a click value, a recommended distance, or a torque for the mount screws. SIG's page prints 100 MOA of travel, which is how far the dot can move, not how far one click moves it. The Primary Arms page prints 1/2 MOA for the Holosun, and that page is not the Amazon cell. Write the number down from the sheet that came in the box. If the sheet is missing, the missing sheet is the fact. Do not borrow a click value from a scope article to finish the job.
So which sight should you buy?
Buy the Holosun if you want part HE507C-GR-X2, ASIN B08G6CJL8C, the green circle-dot, the 1.44-ounce cell, and the metal cell, and if you will confirm an RMR-pattern footprint before you trust the word Weaver. Buy the SIG if you want part SOR52001, ASIN B01C95I8N4, the 20-millimeter tube, the Picatinny cell, and the mounts SIG lists, and if you will read Plastic as a bad cell rather than a housing. Buy neither here if you still need the firearm. That purchase is the dealer's.
No clip is embedded. A sight-in video would show the firearm these photographs leave out.
Frequently asked questions
Holosun HE507C-GR-X2 or SIG SOR52001?
HE507C-GR-X2 if you want the open green circle-dot and you will confirm the footprint before you trust a mounting cell that says Weaver. SOR52001 if you want the enclosed 2-MOA red tube on a Picatinny mount, and you will read SIG's page before you believe an Amazon material cell that says Plastic.
Which sight is heavier on the Amazon card?
The Holosun weight cell says 1.44 ounces. The SIG weight cell says 145 grams, about 5.1 ounces. The ROMEO5 is the heavier card. A Primary Arms line of 1.5 ounces for the Holosun is a dealer listing, not this Amazon cell.
Does the Holosun card include a Picatinny mount?
The mounting cell says Weaver. A Primary Arms listing for HE507C-GR-X2 says the footprint is the RMR pattern and that no Picatinny mount is included. Keep the Amazon cell and the dealer sentence apart until the optic is in your hand.
Why does the ROMEO5 material cell say Plastic?
That is what ASIN B01C95I8N4 prints. SIG's own page for the ROMEO5 describes a metal optic at 5.1 ounces with a CR2032, 40,000 hours, and IPX-7. Do not average Plastic and metal into one material.
Can I buy the pistol or the rifle from this page?
No. These two ASINs are sights. The pistol or the rifle stays at a licensed dealer. This page does not link a firearm or ammunition listing.
Does a video show both optics?
No. A sight-in clip would put a firearm in the frame. No public clip that names HE507C-GR-X2 and SOR52001 belongs on this page. This comparison does not embed a video.