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SIG Sauer MPX K Gun Stats


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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.

SIG Sauer MPX K Specs

1 Brand

2 Category

Technical Data


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






Matte Black

Gun Type



None (Optics Ready)

Barrel Length





24 oz

SIG Sauer MPX K Features

The SIG Sauer MPX K is a semi-automatic pistol chambered in 9x19mm with a standard magazine capacity of 35 rounds.  It has a 4.5 inch barrel with a ½-28 thread at the muzzle in front of a rotating-bolt action driven by a short-stroke gas piston surrounded by a free-floating M-Lok handguard..  Its optics rail stretches from the charging handle to the front of the handguard and is long enough to accommodate a wide variety of optical setups.

SIG Sauer MPX K 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 K Capacity

The SIG Sauer MPX K is chambered in 9x19mm and has a standard magazine capacity of 35 rounds.  Shorter magazines with capacities of 10 and 20 rounds are available in states with magazine restrictions, but the cool kids live in the states where they can use the available 50 round drum magazines.
The MPX K weighs 5 pounds unloaded and measures less than 24 inches long with its stock or arm brace fully extended allowing this gun to easily be used when maneuvering through close-quarter environments.  Its light weight makes it very easy to carry over extended distances and its familiar controls and manual of arms allow for a very easy learning curve.

SIG Sauer MPX K Mobility


SIG Sauer MPX K Ergonomics

The SIG Sauer MPX K takes a lot of inspiration from the AR15, especially in its controls.  SIG improved the handling by offering fully-ambidextrous controls in its charging handle, safety, mag release and bolt release.  The flared magazine well ensures easy insertion of the magazine while under stress, and the M-Lok handguard offers a decent amount of support-hand safety to prevent injury to the user when holding the gun by the magazine well.

SIG Sauer MPX K Fit & Finish

The MPX K is available in black and tan and its receivers are made of aircraft grade aluminum.  All MPX K models include a factory-installed Timney single-stage trigger and include a short vertical picatinny rail along the back of the lower receiver to attach stocks, arm braces, sling mounts and more.  Handguards are available in M-Lok and Keymod setups.

Fit and Finish

How much is a SIG Sauer MPX K worth?

In 2024 a new or used SIG Sauer MPX K value varies depending on supply and demand. In the last 12 months there is great demand for a SIG Sauer MPX K and most semi-auto pistols. The Price for a SIG Sauer MPX K has increased in cost by $0.00 in 2024 compared to 2023.

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

Condition Trade-In Private Party Dealer
New In box $1,292.42 $1,690.09 $1,988.34
Excellent $1,193.00 $1,590.67 $1,789.51
Very Good $1,093.59 $1,590.67 $1,789.51
Good $994.17 $1,491.26 $1,690.09
Fair $695.92 $1,292.42 $1,590.67
Poor $497.09 $994.17 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.

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