1. Sig Sauer
  3. Centerfire Pistols
  5. SIG MPX

SIG MPX

The Sig Sauer MPX is an iconic 9mm sub gun that gives you the best of both modularity with reliability. Explore our wide selection of MPX guns featuring stocks, stabilizing braces, and a variety of barrel lengths. Whatever kind of shooter you are, our collection has the pistol that is right for you. If you need more functionality, don’t worry — you can easily add attachments that complement your use case anytime.
MPX 9MM CENTERFIRE PISTOL

Sig Sauer MPX 9mm Centerfire Pistol

  • $1,576.00 $1,379.99
MPX 9MM W/ PISTOL STABILIZING BRACE

Sig Sauer MPX 9mm Centerfire Pistol with Pistol Stabilizing Brace

  • $1,885.00 $1,449.99
MPX COPPERHEAD 9MM 3.5 IN THREADED BARREL

Sig Sauer MPX Copperhead 9mm Pistol with 3.5 Inch Threaded Barrel

  • $1,579.99
MPX 9MM CENTERFIRE PISTOL W/ KEYMOD RAIL

Sig Sauer MPX 9mm Centerfire Pistol with KeyMod Rail

  • $1,852.00 $1,599.99
MPX COPPERHEAD 9MM W/ 3.5 INCH THREADED BARREL

Sig Sauer MPX Copperhead 9mm Pistol with 3.5 Inch Threaded Barrel (30-Round Magazine)

  • $1,599.99
MPX 9MM PISTOL WITH 4.5 INCH BARREL

Sig Sauer MPX 9mm Pistol with KeyMod Rail and 4.5 Inch Barrel

  • $2,016.00 $1,699.99
MPX COPPERHEAD K 9MM

Sig Sauer MPX Copperhead K 9mm Pistol with PCB Telescoping Brace and Timney Single Stage T

  • $1,835.00 $1,699.99
MPX 9MM SEMI-AUTO PISTOL W/ KEYMOD RAIL

Sig Sauer MPX 9mm Semi-Automatic Pistol with KeyMod Rail and Pistol Stabilizing Brace

  • $2,084.00 $1,799.99
MPX COPPERHEAD 9MM W/ 3.5 INCH TB *CO COMPLIANT

Sig Sauer MPX Copperhead 9mm Flat Dark Earth Pistol (CO Compliant)

  • $1,979.99 $1,799.99
MPX 9MM PISTOL WITH KEYMOD RAIL

Sig Sauer MPX 9mm Pistol with KeyMod Rail and Telescoping Stock

  • $2,162.00 $1,829.99
MPX 9MM FDE PISTOL WITH KEYMOD RAIL

Sig Sauer MPX 9mm Flat Dark Earth Pistol with KeyMod Rail and 4.5 Inch Barrel

  • $2,152.00 $1,829.99
MPX COPPERHEAD 9MM FLAT DARK EARTH PISTOL

Sig Sauer MPX Copperhead 9mm Flat Dark Earth Pistol with Pivoting Contour Brace

  • $2,079.99 $1,899.99
MPX 9MM 3.5` BARREL COPPERHEAD 20RND MAG

Sig Sauer MPX Copperhead 9mm Centerfire Pistol with 3.5 Inch Barrel

  • $2,079.99 $1,899.99
MPX 9MM FDE WITH STABILIZING BRACE

Sig Sauer MPX 9mm Flat Dark Earth (FDE) Semi-Automatic Pistol with Stabilizing Brace

  • $2,298.00 $1,949.99
MPX K 9MM PISTOL COYOTE W/ SIG PCB FOLDING BRACE

Sig Sauer MPX K 9mm Pistol with SIG PCB Folding Brace and Coyote Cerakote Finish

  • $2,298.00 $1,949.99
MPX COPPERHEAD 9MM WITH PCB BRACE

Sig Sauer MPX Copperhead 9mm Pistol with PCB Telescoping Brace and Timney Single Stage Trigger

  • $2,179.99 $1,999.99
MPX COPPERHEAD 9MM 4.5` CARBON STEEL BARREL BLACK ALUMINUM FRAME NO BRACE

Sig Sauer MPX Copperhead 9mm Pistol with 4.5 Inch Barrel (No Brace)

  • $2,179.99 $1,999.99
MPX K 9MM PISTOL W/ SIG PCB FOLDING BRACE

Sig Sauer MPX K 9mm Pistol with SIG PCB Folding Brace

  • $2,099.99
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The SIG MPX: Modularity in a Compact Package

The Sig Sauer MPX is more than just a sub gun. It's a platform designed to have the adaptability to meet the needs of any shooter. Whether it's for security, home defense, or just recreational shooting, the MPX can be customized for your use case. This level of modularity has led to it being frequently compared to AR-15 pistols, which are equally famous for their customization potential.

Like other Sig Sauer firearms, it's incredibly reliable. These guns were built to last, giving you reliable performance for years. If anything does break, the SIG MPX can be easily disassembled, allowing owners to swap the broken part with a brand new one.

Your Go-To Source for Firearms Online

With roots going back to 1938, Sportsman's Outdoor Superstore is proud to be the go-to gun shop for gun owners looking for high-quality firearms at competitive prices. We've made a name for ourselves with our commitment to accurate stock information, fast and free shipping nationwide, and in-house customer service. Our hundreds of positive reviews is a testament to what we've done for our community of fellow gun owners.

The SIG MPX isn't our only gun for sale. If you're looking for a customizable rifle, check out our AR-15s for sale. If you're a hunter, we recommend looking through our selection of high-quality over/under shotguns. Shooters interested in a daily carry for CCW should look at our dedicated Concealed Carry Collection.

Frequently Asked Questions

What is the effective range of the Sig Sauer MPX?

The effective range of the short-barreled MPX is around 25 yards, and it is incredibly accurate at that range. Some shooters have even pushed it to 40 yards and still gotten great accuracy. Its accuracy can be improved by adding a stabilizing brace or stock to reduce recoil.

Is the SIG MPX a short-barreled rifle?

The short answer: It depends. For example, without a brace and a sub-6" barrel length, it is considered a pistol and does not need to be registered as a short-barreled rifle (SBR). With a brace and the same barrel length, it would be considered an SBR. A long 16" barrel can also be added to make it a pistol caliber carbine (PCC).

Be sure to research the most current state and federal laws related to short-barreled rifles before making a purchase.

What ammo does the MPX use?

All of our MPX guns use 9mm ammo. However, the second-generation MPX can be converted to either .357 SIG or 40 S&W.

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