GunCritic Score

Critic Rating

User Rating

19 Reviews



Used Price:


Sale Price:


SIG Sauer MPX Gun Stats


Want to Sell Your Gun?

Get Instant Offer
The SIG MPX is a gas-operated submachine gun designed and manufactured by SIG Sauer, and is primarily chambered in 9×19mm Parabellum cartridge. It is a gas-operated firearm featuring a closed, rotating bolt.[1] These design features, rare in submachine guns, were chosen to enhance the safety of the user and to have a more reliable firearm. It was designed in 2013 and was released to the general public in 2015. It features the SIG Sauer short stroke push-rod gas system to reduce the recoil and improve the reliability of the weapon. The MPX, in its second generation, features a system that would allow for conversion from 9mm to .357 SIG or .40 S&W. However, since its inception, first party conversion kits have not been made available for either of the two production generations of the gun.

SIG Sauer MPX For Sale

SIG Sauer MPX Specs

1 Brand

2 Category

Technical Data


9mm Luger (9mm Parabellum) (9x19mm)




30 RD



Gun Type





97.6 oz

SIG Sauer MPX Features

The SIG Sauer MPX is available as a pistol, submachine gun or pistol caliber carbine and is a gas-operated gun that operates on a short-stroke gas piston and multi-lug rotating bolt.  The recoil system includes a dual-recoil spring that sits over the bolt carrier group to eliminate the need for a buffer tube allowing for a wide variety of stocks to be attached on the rear-mounted picatinny rail.

SIG Sauer MPX Ballistics

9mm Luger (9mm Parabellum) (9x19mm) Ballistic Data
Range (Yards) Drop (inches) Velocity Energy Wind drift (inches) Time (milliseconds)
0 0 0 0 0 0
50 0 0 0 0 0
100 0 0 0 0 0
150 0 0 0 0 0
200 0 0 0 0 0
250 0 0 0 0 0
300 0 0 0 0 0
350 0 0 0 0 0
400 0 0 0 0 0
450 0 0 0 0 0
500 0 0 0 0 0

SIG Sauer MPX Capacity

The MPX is chambered in 9x19mm Parabellum and feeds from steel-reinforced polymer magazines made by Lancer Systems.  While the standard magazine capacity is the typical 30 rounds, Lancer also makes magazines with capacities of 10, 20 and even 35 rounds.  Aftermarket magazine manufacturers also offer a 50 round drum magazine for the MPX.
Measuring as little as 17.6 inches with an unloaded weight of 6.1 pounds, and with an overall length of 24 inches when a stock is extended, the MPX offers excellent maneuverability in all environments.  Considering its low recoil, the MPX surpasses its competition in ease of use as well as mobility.  The MPX’ modularity also allows the gun to be even smaller with different barrels and handguards attached.

SIG Sauer MPX Mobility


SIG Sauer MPX Ergonomics

The MPX has a control layout based on the AR15 with the improvements of an ambidextrous safety, charging handle and magazine release.  The grip that comes with the MPX is more ergonomic than the A2 style grip found on most ARs.  The MPX is available with a variety of handguard options thanks to the gun’s modularity.

SIG Sauer MPX Fit & Finish

The MPX is made with receivers cut from billets of 6061-T6 aircraft grade aluminum, the bolt is made of C158 steel and the bolt carrier is made from 8620 steel just as Eugene Stoner intended.  The MPX’s modularity includes a quick-detach barrel system that includes 2 screws to be removed that are hidden by the handguard.  The stocks can easily be swapped out for an ever-growing number of aftermarket options.
Fit and Finish

SIG Sauer MPX Parts & Upgrades

How much is a SIG Sauer MPX worth?

In 2023 a new or used SIG Sauer MPX value varies depending on supply and demand. In the last 12 months there is great demand for a SIG Sauer MPX and most rifles. The Price for a SIG Sauer MPX has increased in cost by $0.00 in 2023 compared to 2022.

Estimated New and Used Values for a SIG Sauer MPX Values are based on a basic model with no options or colors.

Condition Trade-In Private Party Dealer
New In box $1,326.27 $1,734.35 $2,040.41
Excellent $1,224.25 $1,632.33 $1,836.37
Very Good $1,122.23 $1,632.33 $1,836.37
Good $1,020.21 $1,530.31 $1,734.35
Fair $714.14 $1,326.27 $1,632.33
Poor $510.10 $1,020.21 N/A

Gun Value Conditions explained:

New in box - 100% condition in unopened box. Excellent - 95%+ condition with or without box.

Very Good - 90% - 95% condition (all parts/finish should be original).

Good - 80-90% condition (all parts/finish should be original).

Fair - 30% - 80% condition, parts, and finish may or may not be original. Must function properly and shoot.

Poor - under 30% condition. Firearm has severe wear and tear, does not function, or is damaged.

Guncritic Icon

Want To Sell Your SIG Sauer MPX?

Quick Cash Offer

  • We make you an quick cash offer online

  • We find the dealer that offers you the most money

  • Get cash for your gun or do a trade in

How We Compare to Selling It Yourself

We take all the hassle out of selling your gun.

Speed Icon

Save Time

Quick Cash Offer

Get your cash offer in minutes

Selling it Yourself

Can take months to sell your gun privately

Buyer Icon


Quick Cash Offer

Trusted retailers will pay you for your gun

Selling it Yourself

You don't know who you're selling to, or if they'll rip you off

Price Icon


Quick Cash Offer

I'ts totally free to get a cash offer on your gun

Selling it Yourself

It costs money to place ads to sell your gun, and it takes a lot of time

Diffuculty Icon


Quick Cash Offer

Easy online paperwork and registration process for your safe and legal payout

Selling it Yourself

You have to trust the buyer to pay you, and trust that you're following the law

Rate And Review

SIG Sauer MPX Q & A

There are no questions related to SIG Sauer MPX


SIG Sauer MPX Problems

There are no problems related to SIG Sauer MPX


Related Products