×
Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Pay Chart (2023) Military Ranks
Advertisements

HOME
INFANTRY
MODERN ARMIES
SPECIAL FORCES
COUNTRIES
MANUFACTURERS
COMPARE
BY CONFLICT
BY TYPE
BY DECADE
MODERN

Infantry Small Arms / The Warfighter


SNT Motiv STSM21


Modular Submachine Gun (SMG) [ 2024 ]



The modular-minded, tactical-level STSM21 submachine gun is currently under development by South Korea-based SNT Motiv.



Authored By: Staff Writer | Last Edited: 09/13/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

GO TO SPECIFICATIONS [+]
Advertisements
Currently (2022) under development by South Korean small arms-maker SNT Motiv is the "STSM21", a 9mm-chambered Close Quarters Battle (CQB) Warfighter solution. The design takes into account all proven modern trends in military-level automatic firearms design and presents it in a compact form suitable for urban fighting and SPECial OPerationS (SPECOPS) service. Modularity is at the forefront of this submachine gun with a long length of Picatinny rail set over the receiver - optional front and rear iron sights can be used while optics, aimers, and tactical flashlights. Construction is of durable metals as well as lightweight composites.

The design of this firearm is largely conventional: there is a small, lightweight, adjustable, and collapsible shoulder stock at the rear of the frame. The frame itself is home to the fire selector (within easy reach of the thumb), ergonomically-shaped pistol grip, and oversized trigger ring for a gloved hand. The magazine well sits ahead of the action in the usual way with the ejection port seen just above. All controls are ambidextrous to broaden the gun's market appeal and this includes the charging handle as well as the magazine catch. Magazines are of the straight type and house 20- or 30- 9x19mm Parabellum pistol cartridges. Internally, the gun makes use of the proven delayed blowback system-of-operation. The forend is perforated and the barrel is slotted.

One of the more unique features of the STSM21 is its use of a free-floating barrel, a practice common to sniper rifles where accuracy is the call of the day. The free-floating arrangement has the barrel only touching the frame along its length (and not the forend housing itself) to promote accurate fire.

Overall length of the gun reaches 680mm (600mm collapsed) with a 220mm long barrel assembly - making it ideal for close-quarters work due to inherent portability. Overall unloaded weight is 3.0 kilograms.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.
Advertisements

Specifications



Service Year
2024

Origin
South Korea national flag graphic
South Korea

Classification


Modular Submachine Gun (SMG)


National flag of South Korea South Korea (possible)
(OPERATORS list includes past, present, and future operators when applicable)
Special Forces
Qualities of this weapon have shown its value to Special Forces elements requiring a versatile, reliable solution for the rigors of special assignments.


Overall Length
680 mm
26.77 in
Barrel Length
220 mm
8.66 in
Empty Wgt
6.61 lb
3.00 kg
Sights


Optional Iron Front and Rear; Over-Receiver Optics Supported.


Action


Delayed Blowback System.

Blowback Operation
Gas pressure from the rearward movement of the ignited cartridge case provides the needed bolt movement, ejecting the spent case and stripping a fresh case from the magazine.
(Material presented above is for historical and entertainment value and should not be construed as usable for hardware restoration, maintenance, or general operation - always consult official manufacturer sources for such information)


Caliber(s)*


9x19mm Parabellum

Sample Visuals**


Graphical image of a 9mm pistol cartridge
Rounds / Feed


20- or 30-round detachable box magazine.
Cartridge relative size chart
*May not represent an exhuastive list; calibers are model-specific dependent, always consult official manufacturer sources.
**Graphics not to actual size; not all cartridges may be represented visually; graphics intended for general reference only.
STSM21 - Base Project Designation.


Military lapel ribbon for the American Civil War
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Cold War
Military lapel ribbon for the Korean War
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the Ukranian-Russian War
Military lapel ribbon for the Vietnam War
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2


Ribbon graphics not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns / operations.

Images Gallery



1 / 1
Image from official SNT Motiv marketing materials.


Advertisements







Disclaimer | Privacy Policy | Cookies


2023 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing all American military medals and ribbons.


www.MilitaryFactory.com • All Rights Reserved • Content ©2003-