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SNT Motiv STC16

Modular Assault Rifle [ 2024 ]

The STC16 5.56mm assault rifle is currently in development under the SNT Motiv brand label of South Korea.

Authored By: Staff Writer | Last Edited: 09/12/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

With an eye towards more domestic design, development, and manufacturing of various small arms types, the nation of South Korea quietly modernizes its warfighter under the shadow of threat from the North. Under development is the STC16, a 5.56mm chambered assault rifle solution designed around the rigors and requirements of the modern battlefield, showcasing expected modularity for a gun of this form-and-function.

By and large, the rifle is consistent with AR-15-style assault weapons seen across the Western world.

The STC16 is chambered for the ubiquitous 5.56x45mm NATO standard intermediate rifle cartridge intended for short-to-medium-ranged engagements. Overall weight is 3.0 kilograms and overall length reaches 900mm. Internally, the rifle fires from the proven short-stroke gas-operated piston. Controls are ambidextrous to satisfy both right- and left-handled shooters and this includes the fire selector, magazine catch, and the charging handle. The fire selector switch is within easy reach of the primary hand's thumb. Modularity is offered by way of Picatinny rail sections over the receiver and forend and around the forend at the 3, 9, and 6 o-clock positions. The sections support the mounting of various optics and tactical accessories while optional back-up iron sights are also provided.

The general design of the rifle is conventional: the shoulder / buttstock is skeletal and adjustable. The pistol grip is ergonomically-angled to the rear and the trigger loop is oversized for a gloved hand. The magazine well sits ahead of the trigger ring with the ejection port set over the magazine insertion point. The barrel extends from the forward face of the receiver and is capped by a slotted muzzle brake.©MilitaryFactory.com
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Service Year

South Korea national flag graphic
South Korea


Modular Assault Rifle

National flag of South Korea South Korea (probable)
(OPERATORS list includes past, present, and future operators when applicable)
Automatic Function
Features a mechanical function to automate the firing action.
Assault Rifle
Modern class of long gun featuring select-fire properties, automatic internal function, and magazine feeding.

Overall Length
900 mm
35.43 in
Empty Wgt
6.61 lb
3.00 kg

Over-Receiver Optics; Optional Iron Front and Rear.


Gas-Operated, Short-Stroke Piston.

Short-Stroke Piston
Type of gas operation typically found in rifle-type arms; relatively short amount of piston movement with reliance on sudden blow for quick acceleration of said piston; lever connected to the bolt is actuated, taking on the resultant energy, subsequently passing it on to the awaiting bolt.
Gas-operated system is featured, typically involving a gas cylinder and rear-driven piston directing energy to the bolt component.
(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)


5.56x45mm NATO

Sample Visuals**

Graphical image of a 5.56mm intermediate rifle cartridge
Rounds / Feed

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.
STC16 - Base Series Designation.

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Images Gallery

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Image from official SNT Motiv marketing materials.


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