Country of origin
Germany / Switzerland
9 x 19 mm Parabellum
Length (stock extended)
Length (stock folded)
Cyclic rate of fire
Practical rate of fire
30 - 90 rpm
Range of effective fire
50 ~ 75 m
The SIG MPX
is a submachine gun, developed by SIG Sauer company. It was designed
in 2013. This weapon was first publicly revealed in 2014 or 2015.
The SIG MPX is a gas
operated, selective fire weapon. It
has similar dimensions and weight to the popular
& Koch MP5 submachine gun. Essentially it is a scaled-down
SIG MCX assault rifle, chambered for a standard 9x19 mm Parabellum
ammunition. It is the first submachine gun with a fully closed
and rotating bolt piston system. Such system is typically associated
with assault rifles and was developed for the SIG MCX assault rifle.
It reduces recoil, increases accuracy and reliability of the weapon.
This submachine gun is designed in the way to prevent dirt and water
from entering the chamber and causing stoppages. This weapon also has some features of the Armalite AR-15 (M16)
MPX submachine gun comes with a 165 mm (6.5") barrel. Though
there are versions of this weapon with different barrel lengths.
ambidextrous fire mode selector is located over the pistol grip. It
has settings for "safe", "semi-auto", and "full-auto". There are
semi-automatic only versions of this weapon.
handle resembles that of the Armalite AR-15 (M16) assault rifle and
is located at the back of the weapon. It does not reciprocates when
the weapon is fired. The weapon can be charged with either hand.
The SIG MPX
has a last shot bolt hold open. Bolt release button is ambidextrous.
These features speed up reloading of the weapon.
is fed from 30-round capacity magazines. There are smaller magazines
for civil semi-automatic only versions of this weapon.
The SIG MPX
has got a 3-position telescoping stock. There is also a version with
a side-folding buttstock. Some civilian semi-automatic only models
have no stock at all, or a fitted with a shoulder brace, which can
act as a buttstock.
submachine gun comes with a full-length Picatinny-type scope rail.
It comes as standard with detachable flip-up iron sights. It can
also mount various red dot type sights or laser pointers. Range of
effective fire is only around 50-75 meters.
The MPX can
be fitted with accessory rails on the foregrip. It allows to mount
various add-on tactical accessories, such as laser pointers,
flashlights and so on.
SIG MPX-K is
a compact version. Letter "K" in the designation stands for "Kurz",
or short. This weapon has a 114 mm (4.5") barrel.
SIG MPX-P is
a semi-automatic only pistol version. It has got no buttstock and comes
with a 203 mm (8") barrel. There are some other semi-automatic
only versions of this submachine gun, intended for civil customers
and various security services.
is another semi-automatic only pistol version. However this one is fitted with a
shoulder brace, which also acts as a side-folding stock. It has also got a 203 mm (8") barrel.
is yet another semi-automatic only pistol version. It has a
collapsible stock, similar to that of the baseline submachine gun.
It comes with a 114 mm (4.5"), or 203 mm (8") barrel.
is a submachine gun with integral sound suppressor. In concept it is
similar to the
Heckler & Koch MP5SD. It is aimed at special forces and
elite law enforces units.
SIG MPX-C is
a semi-automatic only version. Externally it can be easily
identified by an extremely long barrel. Even though it is called the
"carbine", essentially it is the baseline MPX submachine gun,
limited to semi-automatic only firing, with a 165 mm (6.5") barrel
and additional 241 mm (9.5") muzzle attachment permanently welded to
CMP-9 is a license-produced version in the United Arab Emirates by
the Caracal International.