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SIG Sauer
XM7
The U.S. Army's Next Generation Squad Weapon rifle, adopted to replace the M4A1 in close-combat units and chambered in a new high-pressure 6.8x51 mm hybrid-case cartridge for improved range and armor penetration. Based on the commercial SIG MCX Spear, it is fielded with the XM157 smart fire-control optic.
Effective range
600 m
💲 Unit cost not fully disclosed under Army contract
Full specifications
Performance
Speed, range, altitude and engagement capability.
- Effective range
Distance at which the weapon reliably hits point targets. Higher extends engagement envelope.
- 600 m 63th pct in class
- Rate of fire
Rounds per minute (cyclic). Higher increases suppression and hit probability.
- 600 rpm 0th pct in class
- Muzzle velocity
Projectile speed leaving the barrel. Higher means flatter trajectory and better armor penetration.
- 945 m/s 88th pct in class
Firepower
Armament, payload and guidance.
- Main armament
Primary weapon: main gun, cannon or missile type.
- 6.8×51 mm hybrid
- Caliber
Bore diameter of the main gun or rifle. Larger throws heavier projectiles; not simply better — ammunition commonality matters.
- 6.8 mm
- Ammunition
Rounds carried (main gun) or standard magazine capacity.
- 20 0th pct in class
Physical
Dimensions, weight and crew.
- Length
Overall length including gun/probe where applicable.
- 0.94 m
- Empty weight
Weight without fuel, ammunition or crew.
- 4 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.
- 356 mm
Program
Cost, production scale and operators.
- Units built
Total production run. Higher means proven manufacturing, mature logistics and spares availability.
- 100,000 13th pct in class
- Operator countries
Number of countries operating the system. More operators means broader support ecosystem.
- 1 0th pct in class
Specifications compiled from public SIG Sauer and reference sources ↗. Published defense figures are approximations — treat comparisons as directional. Last verified 2026-07-01.
Frequently asked questions
How many crew does the SIG Sauer XM7 require? +
The SIG Sauer XM7 requires a crew of 1.
What is the main armament of the SIG Sauer XM7? +
The SIG Sauer XM7's primary weapon is the 6.8×51 mm hybrid.
What is the SIG Sauer XM7 used for? +
The SIG Sauer XM7 is a rifle typically used for infantry combat.
How many countries operate the SIG Sauer XM7? +
The SIG Sauer XM7 is operated by 1 countries.
How much does the SIG Sauer XM7 cost? +
SIG Sauer XM7: Unit cost not fully disclosed under Army contract. Defense program costs are rarely fully public and vary by contract and configuration.