New user hello and quesitons on the Sig Romeo1

Hi to the forum. First post, long time lurker as the oft used saying goes....

I just picked up a new M&P CORE in 40 S&W at a sweet price that I couldn't resist. If the Sig Romeo1 turns out to be as nice as it appears to be from reading about it - That is the one I would like to mount on it.

So, my main question is - and I have been googling for hours on this with no answers found - Will the Sig Romeo1 fit on the M&P Core without any modifications / machining, either using one of the supplied plates or if there is a plate coming with it or available from Sig?

( I am going to call them tomorrow, but I would like to see if anyone out there has an answer tonight!)

Secondary question(s), does the Sig Romeo1 have a unique footprint or does it use one of the existing footprints such as Docter/Fastfire III/Vortex Venom, RMR or the C-More/Vortex Razor?

Lastly, will it sit low enough on the slide to allow seeing both the front and the rear sights?

Any info/comments from those who have handled the Romeo1 would also be appreciated.

According to your link,
SIG ROMEO1™ Mini Reflex Sight
The SIG ROMEO1 Mini Reflex Sight comes with adaptor plate
kits for most of the offerings in SIG P220, P226, P227,
P229, P320, and 1911. The sight will also fit Glock Standard
and MOS frames; S&W Core and M&P; Springfield XD; HK P2000;
and CZ75

Thanks Jim.

One down, two to go.....

Secondary question(s), does the Sig Romeo1 have a unique footprint or does it use one of the existing footprints such as Docter/Fastfire III/Vortex Venom, RMR or the C-More/Vortex Razor?

Lastly, will it sit low enough on the slide to allow seeing both the front and the rear sights?

Geezerhood said:

Lastly, will it sit low enough on the slide to allow seeing both the front and the rear sights?[/I]

Click to expand...

No. Not unless you cut out the slide. Typically all the electronics have to go somewhere so they go into the base. And typical sights are low. You either rely only on the dot or get tall sights


What do you mean "unique footprint"?

Sent from my SCH-I545 using Tapatalk

Geezerhood said:

Thanks Jim.

One down, two to go.....

Secondary question(s), does the Sig Romeo1 have a unique footprint or does it use one of the existing footprints such as Docter/Fastfire III/Vortex Venom, RMR or the C-More/Vortex Razor?

Lastly, will it sit low enough on the slide to allow seeing both the front and the rear sights?

Click to expand...

Since it comes with an adapter plate, I suspect the register plugs are different but the screw hole locations and footprint length are the same. The adapter plates that come with a Core can't change where the screws go (other than where they are in the pistol).

Before you jump to the Romeo take a look at the two red dots I have mounted on my CORE and Glock 17. The red dots can go on the Glock or CORE. One is a Vortex Viper the other a RMR. The Viper when it is adjusted on target you have to remove it to lock the settings and reinstall.

I have a Vortex Vemon on a S. A. RO that I had the slide milled so it was like a CORE. I really like it and the iron sight work fine with it.

Still trying to find out if the Romeo1 matches up with any other existing mounting footprints. (Adapter plate to sight alignment and screw hole locations).

If it does, that will be a big plus for me as I already have several mounting solutions for picatinny rails, 22 LR dovetails and some handgun rear sight dovetails for Burris style plates / mounts.

Examples of matching footprints:

The RMR is unique - doesn't match the mount footprint (geometry and design) of any other red dot sights. (I wish it matched the Burris/Docter)

Vortex Viper and I think the Venom use the same mounting surface footprint as the Burris Fastfire III and I believe the Docter.

Vortex Razor uses the same mounting footprint as the C-More (wish it was Burris /Docter instead)

I don’t know if the Leupold Deltapoint Pro matches any other existing adapter footprints.

You've got plenty of time to look - per Sig Customer Service - the Romeo 1 won't be available as a "standalone" product till December (in Sig speak that means next year ) All of the production is allocated to installation on their guns.

I ended up getting an S&W CORE in 40 cal. Ordered a KKM 9mm barrel for it (Not here yet). Mounted a Burris Fasftire III on it, also tried a Vortex Viper (The Vortex Razor won't fit at all), settled on an RMR with the LED. Great setup. Seems more rugged by far than all the others I looked at and used other then the Deltapoint Pro. The low profile of the RMR makes for easy use of the tall iron sights.

If money wasn't an issue I would go with the RMR on everything, but I have about 10 handguns I want to mount micro red dots on and at least three rifles. None of the sights I have tried really impress me much other than the Deltapoint Pro and the RMR. The Deltapoint is too tall for me on the CORE, otherwise I might have gone that route over the RMR.

I have given up hope of getting a Romeo1 this year, though I still want one or two if they end up being well built and almost as rugged as the RMR / Deltapoint Pro, because of the features and the price.

I am still very curious as to what footprint they chose for it, whether it is proprietary or if they copied an existing one from the list below.

• RMR (Nobody uses this footprint other than Trijicon)
• Leupold Deltapoint Pro/JPoint
• FastFire III (Which uses the same footprint as as the Docter, Vortex Viper and Venom, Primary Arms Micro, Insight Tech MRD, Meopta Meosight II, SightMark Mini-Shot and the Vector Optics Sphinx)
• C-More RTS / STS which is the same as the Vortex Razor red dot footprint.

It looks like the Fastfire / Docter footprint is the most commonly chosen by other makers.

Has anyone seen a Sig Romeo1 yet either on a gun or off to see what other mounts it might fit?

Geezerhood said:

Has anyone seen a Sig Romeo1 yet either on a gun or off to see what other mounts it might fit?

Click to expand...

Yes, you can see it mounted on a SIG P320 RX or Sig Mark 25 RX, but both are very scarce

EdJG said:

Yes, you can see it mounted on a SIG P320 RX or Sig Mark 25 RX, but both are very scarce

Click to expand...

None around here, plus even if there were the shop owners probably wouldn't let me take the Romeo1 off the gun to see what the bottom of the sight looks like......

Geezerhood said:

I ended up getting an S&W CORE in 40 cal. Ordered a KKM 9mm barrel for it (Not here yet). Mounted a Burris Fasftire III on it, also tried a Vortex Viper (The Vortex Razor won't fit at all), settled on an RMR with the LED. Great setup. Seems more rugged by far than all the others I looked at and used other then the Deltapoint Pro. The low profile of the RMR makes for easy use of the tall iron sights.

If money wasn't an issue I would go with the RMR on everything, but I have about 10 handguns I want to mount micro red dots on and at least three rifles. None of the sights I have tried really impress me much other than the Deltapoint Pro and the RMR. The Deltapoint is too tall for me on the CORE, otherwise I might have gone that route over the RMR.

I have given up hope of getting a Romeo1 this year, though I still want one or two if they end up being well built and almost as rugged as the RMR / Deltapoint Pro, because of the features and the price.

I am still very curious as to what footprint they chose for it, whether it is proprietary or if they copied an existing one from the list below.

• RMR (Nobody uses this footprint other than Trijicon)
• Leupold Deltapoint Pro/JPoint
• FastFire III (Which uses the same footprint as as the Docter, Vortex Viper and Venom, Primary Arms Micro, Insight Tech MRD, Meopta Meosight II, SightMark Mini-Shot and the Vector Optics Sphinx)
• C-More RTS / STS which is the same as the Vortex Razor red dot footprint.

It looks like the Fastfire / Docter footprint is the most commonly chosen by other makers.

Has anyone seen a Sig Romeo1 yet either on a gun or off to see what other mounts it might fit?

Click to expand...

I just mounted the Vortex Venom on my new m&p 9L PC. I am able to co-witness, albeit with a slim margin. I mounted it to base plate #5 and C screws. Heading to the range tomorrow to sight it in. I got the Venom over the Viper because it was easier to adjust for wind & elevation. But if I recall right, the viper gives a little more room for co-witnessing. Hope everything works out well.

Took me a long time but welcome to the forum.

So I mounted a Romeo 1 from my Sig P320 RX to my Glock 34. The Romeo 1 did not fit any of the base plates Glock provided. I had to grind down the tabs to get it to fit. Check out the video below that I made if you want more details.

[ame="https://www.youtube.com/watch?v=RWYSgKEd4l4"]https://www.youtube.com/watch?v=RWYSgKEd4l4[/ame]

Cheap Sights

Sig Romeo dropped in a gun store. Bent lens housing. At ~$300, I would think it should withstand such a drop test. Most simple curved aluminum lens guards will not withstand much abuse.



An RMR or Deltapoint are robust enough to survive this kind of unintentional abuse.

Drawbacks to the Deltapoint: tall and long--too long to fit on a CORE.

Vortex drawbacks: too tall; buttons on side that can turn it off; very short battery life; flimsy lens protector

Burris Fast Fire and anything else under $300: you get what you pay for. Cheap is cheap is cheap. It's just that simple. Do they work? Yep. Are they serious equipment for serious uses? No. If you are a competitor whose only consequence of a failed sighting system is points down, no problem. If your life depends on your equipment, only the best will do. If you can't afford it yet, save up.

Trijicon RMR series is really, truly, honestly, the best right now. Fewest drawbacks.

This pistol mounting of red dot sights is developing technology, and we can expect improvements year after year. If Trijicon does not come up with a new and improved line soon, someone else will. The market has pretty well defined desirable features, but no one yet has gotten them all in one package.

That's great info!

That sucks about the Romeo 1, I was hoping it would be more durable than that. I wonder if the trijicon RMR will fit the P320 CX? It seems that the P320 CX is setup for the Romeo 1 only.

According to Sig, The romeo is not aluminum it is magnesium.

FWIW Magnesium is stronger than titanium, aluminum or steel.

I found this old thread of mine (I forgot about it!) when searching for a way to mount a Sig Romeo 1 on a Glock 20 and 21 non MOS (10mm/.45 ACP large width slide). The stuff below is probably old news for most of you since the Romeo 1 sights sold without a Sig pistol have been out there in good numbers for a while now.

I finally bought a Romeo 1 once they became plentiful and discounted a bit. I got the model with the various handgun plates and dovetail blocks included. It arrived yesterday so now I am trying to decide which gun to mount it on. I gave up waiting and got an RMR for my M&P CORE a while back and have been very happy with it.

Overall I am quite impressed by the Romeo 1 other than I am VERY disappointed that Sig chose not to pick one of the existing mounting patterns. I hope they had some good reasons other than *marketing and/or just being different (*To force people to buy their mounts and to prevent direct mounting of competitors sights on their optic ready guns). The screw hole pattern matches the Vortex Viper / Burris Fastfire. The index pins don't match any of the others out there. Seriously bad decision in my book!

Mounting
The Sig Romeo 1 adapter for the S&W M&P C.O.R.E. works well. No issues that I could detect though I have not shot any gun yet with the Romeo mounted. I have a regular M&P (non C.O.R.E.) that I am going to test fit with a bit later.

The Glock standard slide plate and dovetail block also fit well. I might try it for a while on my G27 just for fun.

As for the G20 / 30, Unfortunately it only comes with the "standard" Glock slide width plate. I don't own a Springfield XD and don't ever plan to, so I modified the XD plate to fit the Glock 30 slide. It doesn't have quite the amount of overhang that the smaller Glock plate does on the other slides, but it seems pretty secure. All those plastic plates really do is help to keep the sight from twisting left or right. Since they don't contact the dovetail block or the screws, they don't provide any prevention from front to back recoil caused movement of the sight. If I like it on the the 45 ACP Glocks I may have the slide machined on one of them for the Romeo 1 to live there permanently. Ideally I think I would prefer to have the Glock slide machined to fit the M&P C.O.R.E. plates. That way I can mount pretty much any MRD sight on them later rather than having it only fit the Romeo. So far I have not found anyone offering that service.

My vision is horrible even with glasses due to geezerlyness so I would actually like a red dot or scope on every handgun I own INCLUDING my Ruger LCP II, since I can't shoot well at all anymore with iron sights unless I wear an iris on my glasses which I don't like doing. Plus an iris isn't something that works well for field use or low light. I am going to play with the set of adapter plates that came with the Romeo to see if any of the others might fit some additional handguns I own with minor modifications. The most promising that the Romeo has no specific plate for is my Kahr CM9. The M&P adapter plate fits the slide perfectly. Perhaps one of the dovetail blocks may work as is, but if not one could easily be fitted to the slot.

My thoughts on some of the features / properties

Motion Sensor
The motion sensor works well to turn the sight on / off automatically. Just tapping the table that the sight is resting on turns it on. If you have the gun in a moving car with the sight on, it is going to stay on all the time. With the sight on, gun in a drawer or on the table top, it can turn on when someone walks past the furniture – very sensitive, which is good for a life critical situation. I would gladly trade the motion sensor feature for a battery life that matches the Trijicon RMR but I can live with putting a new battery in every two -3 weeks. They are very cheap in bulk and fairly easy to replace since the cap is magnetic and holds the battery place. The provided tool holds the cap on the tool end, making it even easier to get the cap aligned with the threads and tightened well..


Rear Sight Notch in Sight
For me it is deep enough to actually use as backup iron sights (If only I could SEE iron sights!). I think if you had a good selection of suppressor height front sights to choose from you could sight in most guns using the rear notch, at least as far as elevation goes.

Buttons
Easy to reach, kind of hard to press which is good. I prefer that to a button that is too easy to activate unless you have thick gloves on.

Clarity / Brightness / Brightness Settings
The window is very clear and distortion free. The brightness settings cover pretty much any situation other than shooting at the sun. The owner's manual says there are 5 illumination settings - 4 daytime and 1 NV. My unit actually has 10. I don't know which of those ten are supposed to be NV settings but all are visible to the naked eye in a darker setting. The unit remembers your setting when you manually turn it off. The dot flashes when you have reached the highest or the lowest setting. The difference in brightness between some of the higher settings is not easily detected by me.

Manual On / Off function
The owner's manual says to turn it off, press and hold either button for 2 seconds. That works perfectly. It says to turn it on you “momentarily” press either button. On mine, that does not work. You need to hold the button down for 2 seconds, just like turning it off. I actually prefer that to a momentary touch so I am glad the manual is incorrect. It didn't take me long to figure this out but some people might think that there is a problem until they discover on their own that the 2 second hold is needed for both operations.

Durability / Height / Weight
It is not as low profile as the RMR, nor as ruggedly built, particularly on the protection hood over the lens, but I can just barely see the front iron sight on the M&P Core since the notch is so shallow, but enough to use them. The RMR is significantly better in that regard. I didn't look at the specs but it “feels” lighter than the RMR. I would swap a little extra weight in trade for a steel protective hood like what the Leupold has or the robust hood on the RMR.

Overall Conclusion
I am going to keep it. I haven't seen a sight that matches the positives of the Romeo 1 that fits the M&P CORE for the same price or less, that I feel is built well enough to keep me happy. I like it better than every other Micro Red Dot I have tried on the CORE other than the RMR. At the price point I paid, the trade-offs over the RMR are worth it to me, but for a life critical application I am going to run the RMR. As noted I want an MRD on every handgun (and some rifles) that I own eventually. The cheap Vipers and Fastfires will do fine on several. When I want something better than those, and the added benefits of the RMR don't really matter, I can put a Romeo 1 on more guns for less money than the RMR to the tune of 5:3 with almost $50 left over.

I have the Sig 320RX with the Romeo sight on it. After a lot of getting used to and practice with the red dot it is my carry gun now. I used to carry my Glock 19C but the Sig is more accurate for me with the red dot.