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Product Spotlight: The Sig Sauer MPX
With the aesthetic look of the MP5 and the high-quality controls of an AR-15, what is not to love about the Sig Sauer MPX for sale at GrabAGun? Made to replace the well-known MP5, the Sig MPX is known for its control, well manufactured parts, and it doesn’t break the bank. Check out our line of Sig Sauer MPX guns here or keep reading for more information on this amazing tactical pistol!
Sig Sauer MPX
For all of you that have trained on an AR-15, the Sig Sauer MPX is an easy transition. All versions of the MPX are known to be easy to pick up and shoot, while having easy-to-use controls. The Sig Sauer MPX comes in many different forms and variations, but the Sig MPX K and Sig Copperhead are the two of the most popular models.
While all of the Sig MPX models have different characteristics to make them unique, they also have a few important things in common. One of the best attributes of this gun is the ultra smooth, ultra-fast Timney Trigger. Co-designed by Timney and Sig Sauer, this trigger offers the Timney performance you have come to expect from Sig Sauer. This 9mm Sig Sauer has the reliability needed 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!
Redefining the sub gun category, the Sig MPX for sale has a new level of operator safety, in-field adaptability, and proven reliability in the harshest environments. It features dual-sided selector switch, magazine release, charging handle, and bolt release. This 9mm Pistol Caliber Carbine operates from a fully-closed and locked rotating bolt, offering enhanced reliability and safety in use. A short-stroke gas piston allows this 9mm Sig Sauer to run all weights and brands of 9mm ammo with no adjustments to the gas valve. This handgun will give you the power to respond confidently and effectively, even under adverse conditions. Check out the Sig Sauer MPX from GrabAGun for the best price online!
Sig Sauer MPX K Specs

The Sig Sauer MPX K is great for shooters who want to add accessories, optics, or more mounting options onto the handgun’s optic-ready rail. With the 13.5x1mm TPI, the Sig MPXK is the perfect platform for a suppressor. Chambered in 9mm, the Sig MPX K has a 4.5-inch threaded barrel, comes with one 35-round magazine for optimal reload times, and that ultra-smooth Timney trigger for accurate follow up shots.
Caliber: 9mm | Thread Pattern: M13x1mm | Barrel Description: Threaded Carbon Steel |
Capacity: 30 Rounds | Handguard: M-LOK | Barrel Length: 4.5” |
Frame Finish: Black | Grips: Black Polymer | Magazines: 1 |
Safety: No Manual | Frame Material: Aluminum | Sights: Optic Ready |
Sig Sauer MPX Copperhead with Brace Specs

Just a little smaller than the Sig MPX K, the Sig Sauer MPX Copperhead is a great truck gun with easy storage. It features a monolithic Elite Series Cerakote finish upper receiver with an integrated stock knuckle lower. This particular version comes with a brace attached for easier use and folds for easy storage. NFA rules apply.
Caliber: 9mm | Sights: Optic Ready | Barrel Description: Carbon Steel |
Capacity: 20 Rounds | Handguard: M-LOK | Barrel Length: 4.5” |
Frame Finish: Black | Grips: Black Polymer | Magazines: 1 |
Safety: No Manual | Frame Material: Aluminum | Included: Folding Pivoting Contour Brace |
Sig Sauer MPX Copperhead Specs

With all of the same great features, this Sig Copperhead features a 4.5-inch barrel with an integrated muzzle brake, a black finish, and is optic ready. Even without a brace, this 9mm handgun makes a powerful MPX platform that will give you all of the features you expect from a Sig MPX.
Caliber: 9mm | Sights: Optic Ready | Barrel Description: Carbon Steel |
Capacity: 20 Rounds | Handguard: M-LOK | Barrel Length: 4.5” |
Frame Finish: Black | Grips: Black Polymer | Magazines: 1 |
Safety: Ambidextrous | Frame Material: Aluminum | Included: No Brace Included |
Sig Sauer MPX Copperhead Tan Specs

Are you looking for something just a bit smaller? This version of the Sig MPX Copperhead has a smaller 3.5-inch barrel and a tan finish for a look different from the classic black. Get this Sig Copperhead from GrabAGun, the best online gun store!
Caliber: 9mm | Sights: Optic Ready | Barrel Description: Carbon Steel |
Capacity: 20 Rounds | Handguard: M-LOK | Barrel Length: 3.5” |
Frame Finish: Tan | Grips: Black Polymer | Magazines: 1 |
Safety: Ambidextrous | Frame Material: Aluminum | Included: No Brace Included |
The Sig Sauer MPX at GrabAGun
The Sig MPX K and Sig Copperhead are great choices for a fun time at the range or for competition use right out of the box. Go to GrabAGun.com for your new 9mm Sig Sauer handgun for the Sig MPX price you’ll love. Don’t forget to sign up for our email newsletter, The Freedom Team, to receive updates as our best deals go live! Check out our line of 9mm Sig Sauer handguns and get some 9mm ammo for sale, available with flat-rate shipping!
–Destinee Norman
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