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Sig Sauer M400 Elite w/ Romeo5 - 16" 5.56mm NATO

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Sig Sauer M400 Elite w/ Romeo5, 5.56mm NATO, 16" BBL, 30rd

Sig Sauer M400 Elite w/ Romeo5 - 16" 5.56mm NATO

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Accurate, lightweight and crafted from the finest components and a titanium finish, the SIGM400 Elite sets the new standard for direct-impingement AR-15s.

Our competition fails to realize that a rock-solid foundation only gets you so far. That explains why many of today’s rifles ship with plastic handguards and throwaway furniture, two things not found on the SIGM400 Elite, SIG SAUER’s take on what an AR-15 should be. This carbine comes with the good stuff—all of it—pre-installed. Like a free-floating M-LOK handguard, which promotes accuracy and handling. Or a quality grip and premium, 6-position buttstock with integral QD points. The Enhanced SIG Trigger on the M400 Elite enables the shooter to extract excellent accuracy from the rifle’s lightweight, 16” nitride barrel that is equipped with a SIG Micro-light Gas Block. Further sweetening this ready-to-shoot package is an optional ROMEO5 red dot sight that features MOTAC (Motion Activated Illumination) and an insane 40,000-hour battery life.

Specifications are subject to change.

Additional Information

SKU RM400-16B-E-R
UPC Code 798681573226
Caliber .223 / 5.56
Manufacturer Sig Sauer
Sights (detailed) Romeo5 Red Dot
Frame Finish Black
Barrel Length (in) 16.0 in
Mag Capacity / Rounds 30rd
Number of Mags 1
Accessory Rail Yes
FFL Requirements All firearms must be shipped to a Federal Firearms License (FFL) holder. We cannot and will not ship firearms to anyone but a FFL. We must receive the receiving dealer's FFL by fax (314-558-8429) or email (ffl@osagecountyguns.com).

Product Questions

Product Questions

How does MOTAC work? My Romeo5 doesn't seem to turn off like it should.

The Romeo5 and other Sig Electro Optics that have MOTAC (Motion Activated Illumination) are very sensitive to any motion or even vibration.

From Sig Sauer: MOTAC increases battery life by shutting down the system when not in use and instantly activates the system when it senses the slightest vibration or movement. Your sight will be up when you go into action. The ROMEO5 will mount on any platform and the solid aluminum design will give peak performance and years of service.

We have sold thousands of Romeo5 optics and have never seen one that had a defective MOTAC feature. To test the MOTAC feature, turn on the optic and place the optic on a solid surface that has no vibration (a table top, desk, or chair) in a manner in which you can look through and see the dot without having to move or touch the optic. Ensure that there is nothing which might create a vibration and let the optic sit for approximately one minute. The reticle should turn off. You can look through the optic and see that the Romeo5 shuts itself off. If you tap or even slightly move the optic, it will turn back on.

Very slight vibrations, even those from an incandescent light (a customer tested his on the shelf of his safe and an incandescent light was mounted on the underside of the shelf) can prevent the sight from shutting itself off.

Referenced product: SOR52001

Applies to Sig optics featuring MOTAC including most if not all: Romeo1, Romeo3, Romeo4, Romeo5, Romeo6

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I just received my Romeo5 and it doesn't seem to work. What should I do?

Referenced product: SOR52001

There are a few steps to troubleshoot the Romeo5 to verify if it is functioning properly.

First, please check to ensure the battery is installed properly. The positive terminal should face away from the optic as shown:

Sig Romeo5 Battery Installation

Next, press and hold the + button on the top of the Romeo5 for approximately three seconds to activate it. It is possible that the intensity is turned down very low where the dot is difficult to see. Press the + button five to ten times to check if the dot becomes visible.

Last, if these steps do not work, it is recommended to test another battery, if you have one available. The Romeo5 uses a CR2032.

If you still have problems after trying the steps above, we recommend calling Sig Sauer's support staff by calling 603-610-3000 (option 1).

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