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Sig Sauer SIGMPX 9mm 16" Bbl Rifle w/Folding Stock, M-LOK Handguard & (1) 35rd Mag RMPX-16B-9-35

SKU RMPX-16B-9-35-Sig

October 25th, 2023 through December 25th, 2023, purchase any* new Sig Sauer Firearm and Optic and receive up to $200 in credit to SigSauer.com!

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*This offer excludes the P322, ROMEOZERO-ELITE micro red dot, and all SIG AIR Products. Promotion fulfilled by Sig Sauer. Excludes used and like new products.

This item ships for $13.95

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FFL Requirements
This item can only be shipped to a Licensed Federal Firearms Dealer. Please see our Shipping Policy to review firearms shipping requirements.
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No Exports
Due to government regulations and/or manufacturer stipulations we are unable to export this item outside of the United States. Please see our Export Policy.


Sig Sauer’s MPX delivers versatility, reliability, and is ready for competitions right out of the box. Designed with professional input, the MPX utilizes a gas-operated short-stroke piston system that helps cut down on recoil and carbon fouling, as well as a fully locked and closed rotating bolt system for maximum safety in case of bullet or water obstruction in the bore. The MPX is equipped with a low profile handguard that offers the same feel of an M4, with lightening cuts to reduce weight and help vent off the heat generated from prolonged firing. In terms of customization, the MPX is outfitted with M-LOK attachment points in the 3, 6, 9, and 12 o’clock positions to allow a wide assortment of accessories to be installed, and a flattop picatinny rail on the receiver and end of the handguard accomadates the use of optics and iron sights.

Other features of the MPX includes fully ambidextrous AR-style controls, and a Magpul MOE SL-K stock which is collapsible and foldable. In addition, the MPX’s barrel is topped with a 3-chamber compensator to greatly mitigate recoil and muzzle rise, and a flared magazine well is included to speed up reloads.

Features of the Sig MPX:

  • Low profile handguard with lightening cuts and M-LOK attachment points in the 3, 6, 9, and 12 o’clock positions
  • Flattop picatinny rail on receiver and end of handguard
  • Fully ambidextrous AR-style controls
  • 3-chamber compensator
  • Magpul MOE SL-K foldable/collapsible stock
  • Flared magazine well


  • Caliber:9mm
  • Weight:6.8 lbs
  • Rifle Overall Length:36.75 inches (extended stock)
    33.25 inches (collapsed stock)
    26.75 inches (folded stock)
  • Action:Gas pistol - semiautomatic
  • Safety:Ambidextrous AR-style selector
  • Rifle Barrel Length:16 inches
  • Rifle Stock:Magpul MOE SL-K folding/collapsing stock
  • Scope Mount:Flattop picatinny rail
  • Magazines Included:(1) 35 round magazine
  • Iron Sights No
  • Caliber or Gauge:9mm
  • HandednessAmbidextrous
  • Item ConditionNew
  • Product TypeRifles
  • UPC798681666751
  • MPNRMPX-16B-9-35

Customer Reviews

Average Rating
October 7, 2022

I ordered: https://www.eurooptic.com/Sig-Sauer-SIG-MPX-9mm-Rifle-16in-Competition-Blk-Semi-Fold-Tele-Al-MLOK-Hg-Carbi.aspx Which comes with a Sig stock, with QD mounts. Instead, received this one, which has a Magpul stock, without the QD. Called customer service, and their response was "Oh, this is the same SKU as the one you ordered. We don't have any of the ones you ordered. Or maybe the picture on the one you ordered was wrong" ??? You had it when I ordered it. My guess is that they ran out of the old stock, and filled it with new. Which I wouldn't have minded so much, had anyone let me know. So, it gets marked down for two reasons. 1. I didn't get the rifle that I ordered. 2. The new buttstock has less features than the old.

EO: We get why this is frustrating, but it's that way for us too - these were changed inline by Sig with no notification or update to us, and with no change in the part number. They simply started shipping something else in the same box. Truly sorry for any frustration, we are happy to take the gun back and refund any money.

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