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United States SIG Sauer
MCX Spear LT
A short-stroke gas-piston carbine derived from the SIG Spear rifle adopted by the U.S. Army as the XM7, offered commercially in 5.56×45mm and other calibers with the same modular multi-caliber architecture. It is marketed to civilian, law-enforcement and export military customers as a lighter-caliber sibling to the Next Generation Squad Weapon.
In service since 2022 · 5 operator countries
Compiled from public sources ·primary reference ↗ ·last verified 2026-07-02
500
m range
700
rpm
900
m/s
30
rds
💲 ≈ $2,200, Approximate retail/export unit price
Procurement snapshot
Availability & export
US ITAR-controlled
Export needs U.S. State Dept (DDTC) approval; end-use & re-transfer restrictions apply.
Channel: Foreign Military Sales (FMS) or Direct Commercial Sale
Fielded & proven
Established · 5 operators
In service since 2022. Status: active · ~50,000 built.
Lifecycle cost (est.)
Unit cost known; one-shot / small-arms class has no meaningful O&S tail to model.
Interoperability
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 |
|---|---|
| Rate of fire Rounds per minute (cyclic). Higher increases suppression and hit probability. | 700 rpm |
| Muzzle velocity Projectile speed leaving the barrel. Higher means flatter trajectory and better armor penetration. | 900 m/s |
Firepower
Armament, payload and guidance.
| Main armament Primary weapon: main gun, cannon or missile type. | 5.56×45 mm NATO |
|---|---|
| Caliber Bore diameter of the main gun or rifle. Larger throws heavier projectiles; not simply better, ammunition commonality matters. | 5.6 mm |
| Ammunition Rounds carried (main gun) or standard magazine capacity. | 30 |
Physical
Dimensions, weight and crew.
| Length Overall length including gun/probe where applicable. | 0.86 m |
|---|---|
| Empty weight Weight without fuel, ammunition or crew. | 3 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. | 355 mm |
Munition
Round type, penetration, velocity and projectile data.
| Caliber Bore diameter the round is fired from. | 6 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. | $2,200 |
|---|---|
| Units built Total production run. Higher means proven manufacturing, mature logistics and spares availability. | 50,000 |
| Operator countries Number of countries operating the system. More operators means broader support ecosystem. | 5 |
Specifications compiled from public SIG Sauer 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 SIG Sauer MCX Spear LT require? +
The SIG Sauer MCX Spear LT requires a crew of 1.
What is the main armament of the SIG Sauer MCX Spear LT? +
The SIG Sauer MCX Spear LT's primary weapon is the 5.56×45 mm NATO.
What is the SIG Sauer MCX Spear LT used for? +
The SIG Sauer MCX Spear LT is a rifle & long arms typically used for infantry combat.
How many countries operate the SIG Sauer MCX Spear LT? +
The SIG Sauer MCX Spear LT is operated by 5 countries.
How much does the SIG Sauer MCX Spear LT cost? +
The SIG Sauer MCX Spear LT has an approximate unit cost of 2,200 USD. Defense pricing varies by contract, offsets and configuration, treat this as directional.
