Sig Sauer MPX-K Pistol (FDE) 4.5" Gen 2 (9mm) M-LOK Rail with SIG PCB Folding Brace & Holosun Optic

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This Sig Sauer MPX-K comes the following upgrades:

  • Timney Flat Trigger
  • Sig PCB Folding Pistol Brace
  • Holosun HS510C-GR Open Reflex Sight
  • Magpul MBUS Flip-up Sights
  • KAK Industries MPX Micro Slimline Flash Can
  • Arisaka Defense Finger Stop
The choice of professionals worldwide, the MPX K offers a closed bolt gas piston system that is ultra reliable and durable. As with all MPX, the K is modular allowing for multiple handguard and barrel lengths and is ready to go for suppressor use. For 2019, the K now features the SIG PCB folding brace which allows the K to fold into an ultra-compact size and be operable in the folded position. The K also features an updated M-Lok handguard which is available as accessories in multiple lengths for suppressor coverage. Finally, the K is upgraded with the ultra smooth, ultra-fast Timney Trigger. Co-designed by Timney and SIG, this trigger offers the Timney performance you have come to expect we with the ultimate reliability to make it survive the punishment of a sub gun platform. If you are looking for the ultimate modular sub gun, look no further than the MPX K from SIG SAUER.


Holosun HS510C-GR

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 (Gen2)
TypePistol:  Semi-Auto
ActionGas Operated Semi-Auto
ReceiverCoyote Brown
SightsMagpul MBUS Flip-up Sights
Pistol BraceSIG PBC Folding Pistol Brace
TriggerTimney Single Stage MPX Trigger
Barrel Length4.5″
Muzzle DeviceKAK Industies MPX Micro Slimline Flash Can
Overall Length22.25″
Weight5.0 lbs
OpticHolosun HS510C-GR
MagazineOne 30-Rd Magazine (Gen2)
Product UPC Code798681600540
Manufacturer SKUPMPX-4B-9-COY-HS510C

Additional Information Content

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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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