Sig SauerRomeo Zero 1x24mm SpectraCoat Lens HD Lens Ultra-Compact Micro Reflex Sight

Love it....dude that tried to rob me didn't like

I have been a Gunsmith for 44 years and have mounted more RMR type sights than I can remember. The Sig ROMEOzero was very straight forward in its mounting. It was mounted on a Glock 27, .40 S&W utilizing a dovetail mounting plate. The majority of these sights are metal but the ROMEOzero is a polymer housing. This particular mounting was for my personal EDC firearm and I can honestly say I have mounted more different brands than I can remember. I chose the Sig because I wanted a sight that was small but still presented an excellent sight picture. The instructions from Sig were well written and would serve a shooter who has never mounted this type of sight. Of note and great importance is the warning of not to over tighten he mounting screws because it could deform the polymer and cause the sight to malfunction.My first observations were the automatic waking of the sight with the slightest movement. Yes, this is going to cause the sight to be on with the daily movements but off whenever the firearm is still. The presentation of the red dot is very impressive when bringing the firearm up to the shooting position. I found that I needed to bring the intensity of the red dot down to mid level of brightness. Doing so gave excellent presentation in bright sunlight as well as total darkness. I urge the shooter to experiment with this to find what works best for them.Range time revealed the need for sight adjustment. Shooting at a 7 yard distance I fount he elevation to be perfect but I did need to adjust windage to the right. The adjustment screws are well defined with arrows indicating direction of travel. They are also pronounced with a solid felt click for each moment of travel. After adjustments over 50 rounds were fired with the sight holding perfectly. All screws were checked for problems and none found. I am also an NRA pistol instructor and Training Counselor and would urge anyone to consider this sight or one like it for defensive shooting. It gives the shooter faster sight acquisition and far better grouping than standard “iron sights”.Lastly I paid for this and have not been compensated in any way. Be SAFE…..Shoot WELL

Perfect fit easy to set up and use. Would buy again

Battery is not captured, just in between slide and sight unless you use the included thin metal "shield". Two sets of screws included. One set is for mounting to P365(?) I guess. The screws have unthreaded shoulders that act like bushings inside the red dot base. The ones for the Sig mount pass thru the holes in the base like they should. The other 6-32 screws also have bushing/shoulders and do not pass thru the base properly. I was told by Sig tech support to "just push them thru". That is what I did and they just spin in my S&W Shield with optics cut. I found some 6-32 switch plate screws that work for now. I am going to zero the sight if possible and run 50 rnds thru pistol to see what happens. The only controls are/is a button inside the tombstone just this side of the glass (?) You can supposedly use it to turn off and on and adjust brightness. The brightness adjust does work. Accessing that button is whole nuther issue. My man fingers cannot access the button. I have been using a flat screwdriver blade. Not ideal and neither is the placement of the button. Probably the absolute WORST place they could have possibly put it. The MOTACS does work but I see the adjustment of the brightness of the dot being very problematic. There is no brightness level that will work for all conditions so being able to adjust it quickly would be necessary for any red dot. That is not going to happen here. You get what you pay for and sometimes what you think is a tool turns out to be a toy. No way I would bet my life on this thing.

Works very well!

Holds zero works great!

This sight will make you a better shooter.

I put this on a S&W M&P Shield 9 EZ and have used it for 3 months now. It required a separate dove-tail plate adapter (not included here, in fact not even found on Amazon last time I checked).If you didn't know, you need to zero any sight you buy. Do not trust it to be perfectly zeroed from the factory. Mine was waaaay off out-of-box. The windage and elevation screws can be tight at times, so gently use the included hex tool to adjust.I was able to significantly scratch the inside where you look through, the view-port, within a couple days. I don't know from what, I don't blame the product - but just know that it's NOT scratch proof. Surprising the more exposed side, the side you don't look through, is unscratched after 3 months. The view-port also gets easily smudged with dust and oil. Cleaning it requires a soft-cloth and a thin tool in order to reach the edges with the cloth.The button to adjust brightness is NOT easily accessible. It is horribly deep near the actual view-port glass, and you have to press it pretty hard to cycle the brightness. I wish the button was on the sides or back.The red dot itself has perfect low to high brightness, no issue there. It claims to have "motion-detection" which I have observed is true, but sometimes it doesn't turn off as expected. I've put my firearm down on a table for a day, and came back to see that the red dot was still on. I've also observed that the dot does turn off after awhile. So it just seems to be finnicky.Installation was simple. Comes with various screws.Overall decent purchase, does its job, but pretty pricey when it has a handful of issues. 3 stars because of this. Would be 4 stars if it wasn't so expensive, because it's still very functional even with my issues.Edit after 6 months of use:The motion-detection feature seems to completely not work. Perhaps it's detecting the miniscule motions of the Earth, because it just doesn't seem to turn off when inactive. I've put it down in multiple different locations of my house, and the dot stays on several hours after. The battery has already died after 6 months, so I'll need to throw the irons on until I can pickup a new battery. Disappointing, as the motion-detection was the most important feature I wanted.