SIG SAUER Electro-Optics ROMEO-M17 Receives NSN Designation

Matthew Moss
by Matthew Moss
SIG SAUER Electro-Optics ROMEO-M17 Receives NSN Designation

SIG Sauer have announced that their ROMEO-M17 pistol red dot sight has been given a NATO Stock Number (NSN). NSN 1240-01-713-9795 was developed for the U.S. Army’s Modular Handgun System program, which adopted the SIG P320 as the M17. NATO Stock Numbers are 13-digit numbers that help standardize supply across the NATO alliance, they are assigned by the National Codification Bureau.


SIG Romeo M17 (TFBTV)

Here’s SIG Sauer’s announcement in full:

SIG SAUER, Inc. is honored to announce the ROMEO-M17 (RM17) red dot sight has been assigned a NATO Stock Number (NSN). This distinguished designation is part of the continued modernization efforts of the Modular Handgun System (MHS) Program. For inclusion on the MHS Additional Authorized List (AAL), the U.S. Army evaluated numerous pistol red dot sights, from multiple manufacturers, through vigorous environmental and performance evaluations and the RM17 and R2 achieved successful selection. In fact, the RM17 stood above the rest as the best performing and most durable sight evaluated. The issuance of the NSN to these products streamlines the procurement process for all NATO members and partner countries as an identified standardized material.

The ROMEO-M17 (NSN: 1240-01-713-9795) was developed from the ground up for the U.S. Army’s Modular Handgun System and is the ultimate aiming solution. The RM17 will withstand the rigors of the battlefield, featuring the proprietary SIG-LOC™ mounting system with bottom-mount technology and 5 interface points with the pistol slide, for an extremely strong and robust lock-up. Combined with the side-mounted battery the sight has an extremely low position when mounted to the slide, offering a full sight picture and co-witness with the existing standard-height iron sights.

“The assignment of an NSN number is an exciting achievement for SIG SAUER Electro-Optics and the ROMEO product line. With the global demand for these products the NSN assignment will allow for ease in the procurement process, the ability to increase our reach within the NATO countries, and faster deployment” said Andy York, President, SIG SAUER Electro-Optics. “This assignment is also significant to non-NATO customers and civilians as the NSN designation does not come easily and signifies that the ROMEO-M17 has achieved a testing and use acceptance by the world’s most discerning military customers.”

The SIG SAUER Electro-Optics ROMEO-M17 is a mil-spec, fully enclosed and gas-purged red dot reflex sight with a distortion-free glass aspheric lens and is submersible to depths up to 35 meters. Other features include a new and very robust flexure-arm adjustment system made of the same Beryllium Copper found in many riflescope designs, and a housing that is forged and machined from 7075 Aluminum with an integrated loaded chamber indicator (LCI) gas deflector and machined anti-reflection grooves on all rear facing surfaces for reduced glare. The optic incorporates a high-efficiency point source red LED emitter, with 2 MOA dot/32 MOA circle reticle, independent brightness adjustment buttons, 15 brightness settings including night vision settings, and a side-mounted CR2032 battery compartment with a threaded battery cap so the optic does not need to be removed from the pistol for battery changes. The ROMEO-M17 has a minimum continuous runtime of 50,000 hours at medium brightness setting, and utilizes MOTAC™ (Motion Activated Illumination), MAGNETAC™ (Magnetic Activation), and D.A.R.C™ (Dark Adaptive Reticles & Coatings) technologies.

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Matthew Moss
Matthew Moss

Managing Editor: & Overt Matt is a British historian specialising in small arms development and military history. He has written several books and for a variety of publications in both the US and UK. Matt is also runs The Armourer's Bench, a video series on historically significant small arms. Here on TFB he covers product and current military small arms news. Reach Matt at:

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29 of 39 comments
  • W B W B on Nov 06, 2023

    I like the way this optic mounts and the way it is incorporated into the slide. With that said I will not own one because I refuse to buy anymore Sig products. My 322 has been sent back to the factory and is still the most unreliable firearm I have ever owned, even with a steady diet of Mini-Mags. My 365 X-Macro feels very nice and compact but it does not inspire confidence at all, especially with reports of random discharges. Their red dots seem pretty good but for the price of their higher end models I would rather buy an Aimpoint or Trijicon (Not the MRO).

    • See 26 previous
    • Andrew Andrew on Nov 16, 2023

      @Beju I use a couple 508Ts and a few others quite a bit, so that may be good.

  • Aerodawg Aerodawg on Nov 07, 2023

    Like, that's not exactly an achievement....