Sig Sauer MPX-K Pistol 9mm (Black) with M-LOK Rail, SB Tactical Pistol Brace & Holosun Optic

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Sig Sauer MPX-K Pistol – 4.5″ Barrel – M-LOK Rail

Unconventional design, unmatched performance, and familiar AR handling. The SIG MPX redefines the submachine gun category with a new level of operator safety, in-field adaptability and proven reliability in the harshest environments. Completely ambidextrous, the SIG MPX is great for left- or right-handed shooters with its dual-sided selector switch, magazine release, charging handle and bolt release. The SIG MPX operates from a fully-closed and locked rotating bolt, offering enhanced reliability and safety in use. A short-stroke gas piston allows the SIG MPX to run all weights and brands of 9mm ammunition with no adjustments to the gas valve. A full-length picatinny rail allows for solid, consistent mounting of optics and targeting lasers. The MPX K features a 4.5″ barrel and a short aluminum  handguard with handstop.

This item comes with:

  • SB Tactical Pistol Stabilizing Brace
  • Sig Sauer Flip-up Sights
  • Sig Sauer Sling
  • Holosun HS510C Open Reflex Sight (Green)
  • MPX Micro Slimline Flash Can
  • Arisaka Finger Stop

Holosun HS510C Open Reflex Sight (Green)

The HE510C-GR Elite is Holosun’s flagship Open Reflex optic. Now equipped with Holosun’s highly efficient green reticle, the HE510C-GR Elite has an open frame for a wide sight picture. The HS510C Elite is powered by our new, “Advanced Super Solar Technology” as well as, a CR2032 battery. Utilizing our multi-reticle system (MRS) this unit features three reticle choices. The HE510C-GR can be switched between a 65 MOA circle with 2 MOA dot, a 2 MOA dot only, or a 65 MOA ring only, all at the push of a button. This optic is protected by a titanium-alloyed hood.


Additional Information
ManufacturerSig Sauer
ModelMPX-K Pistol (Black)
TypePistol:  Semi-Auto
ActionGas Operated Semi-Auto
SightsSig Sauer Flip-up Sights
OpticHolosun HS510C-GR Open Reflex Sight (Green)
Barrel Length4.5″
Pistol BraceSB Tactical MPX Pistol Brace
Overall Length18.5″ retracted;  23″ extended
Weight6.6 lbs.
MagazineOne 30-Round Gen2 Magazine
AccessoriesSig Sauer OEM Sling, Mini Blast Can and other product gear
UPC Product Code:798681563487
Manufacturer SKUMPX-K-9-KM-PSB-HS510C

Additional Information Content

Modern Warriors

We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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