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South Korea ST Motiv
K11
A dual-barrel airburst smart rifle combining a conventional 5.56mm assault-rifle barrel with an integrated 20mm programmable air-bursting grenade launcher and fire-control computer. Developed for the Republic of Korea Armed Forces, it lets a single infantryman engage targets behind cover with computer-fuzed airburst rounds.
In service since 2010 · 1 operator countries
Compiled from public sources ·primary reference ↗ ·last verified 2026-07-02
500
m range
920
m/s
30
rds
💲 ≈ $14,000 — Approximate ROK military unit procurement cost estimate
Procurement snapshot
Availability & export
ROK export-licensed
DAPA-administered; aggressive export posture with financing/offset packages.
Channel: Government-to-government
Fielded & proven
Limited · 1 operator
In service since 2010. Status: active · ~4,000 built.
Lifecycle cost (est.)
Unit cost known; one-shot / small-arms class has no meaningful O&S tail to model.
Interoperability
No standardised NATO calibre / datalink detected in public specs.
Derived guidance from public data — export regime by country of origin, lifecycle from the GAO ~30% acquisition rule. Verify eligibility, pricing and offsets with the manufacturer and your acquisition authority.
Full specifications
Performance
Speed, range, altitude and engagement capability.
- Effective range
Distance at which the weapon reliably hits point targets. Higher extends engagement envelope.
- 500 m Stronger than 52% of rifles
- Muzzle velocity
Projectile speed leaving the barrel. Higher means flatter trajectory and better armor penetration.
- 920 m/s Stronger than 77% of rifles
Firepower
Armament, payload and guidance.
- Main armament
Primary weapon: main gun, cannon or missile type.
- 5.56×45 mm NATO / 20 mm airburst grenade
- Caliber
Bore diameter of the main gun or rifle. Larger throws heavier projectiles; not simply better — ammunition commonality matters.
- 20 mm
- Ammunition
Rounds carried (main gun) or standard magazine capacity.
- 30 Stronger than 58% of rifles
Physical
Dimensions, weight and crew.
- Length
Overall length including gun/probe where applicable.
- 0.86 m
- Empty weight
Weight without fuel, ammunition or crew.
- 6 kg
- Crew
Personnel required to operate. Fewer reduces exposure; autoloaders trade a loader for mechanical complexity.
- 1
- Barrel length
Barrel length — longer improves muzzle velocity and accuracy, shorter improves handling.
- 400 mm
Program
Cost, production scale and operators.
- Unit cost
Approximate flyaway/unit cost where public. Defense pricing varies hugely by contract, offsets and configuration. Lower is cheaper.
- $14,000 Bottom 8% of rifles
- Units built
Total production run. Higher means proven manufacturing, mature logistics and spares availability.
- 4,000 Bottom 1% of rifles
- Operator countries
Number of countries operating the system. More operators means broader support ecosystem.
- 1 Bottom 6% of rifles
Specifications compiled from public ST Motiv and reference sources ↗. Published defense figures are approximations — treat comparisons as directional. Last verified 2026-07-02.
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Tula Arms Plant AEK-971 Frequently asked questions
How many crew does the ST Motiv K11 require? +
The ST Motiv K11 requires a crew of 1.
What is the main armament of the ST Motiv K11? +
The ST Motiv K11's primary weapon is the 5.56×45 mm NATO / 20 mm airburst grenade.
What is the ST Motiv K11 used for? +
The ST Motiv K11 is a rifle & long arms typically used for infantry combat.
How many countries operate the ST Motiv K11? +
The ST Motiv K11 is operated by 1 countries.
How much does the ST Motiv K11 cost? +
The ST Motiv K11 has an approximate unit cost of 14,000 USD. Defense pricing varies by contract, offsets and configuration — treat this as directional.
