U.S. Marine Corps’ Mk13 Mod 7 Long Range Sniper Rifle Reaches Full Operational Capability

The U.S. Marine Corps’ new Mk13 Mod 7 Long Range Sniper Rifle has reached full operational capability in the second quarter of fiscal year 2019, the service announced.

The Mk13 Mod 7 Long Range Sniper Rifle is a bolt-action, precision-firing rifle that offers more accuracy and range than similar weapons of yesteryear. The system partially replaces the M40A6—the legacy system—and gives Marines increased lethality.

“Marines will primarily use the Mk13 during deployments, while the M40A6 will serve as a training rifle for snipers”, according to Capt. Nick Berger, Marine Corps Systems Command (MCSC)’s project officer for the Mk13.

The Mk13 increases scout snipers’ range by roughly 300 meters and will use the .300 Winchester Magnum caliber round, a heavier grain projectile with faster muzzle velocity—characteristics that align Marine sniper capability with the U.S. Army and Special Operations Command. The Marines’ legacy sniper rifle uses smaller 7.62×51mm NATO rounds and the additional velocity offered by the Mk13 will be advantageous on the battlefield.

The rifle includes the M571, an enhanced day optic that provides greater magnification range and an improved reticle. The new optic enables Marines to positively identify enemies at greater distances and creates a larger buffer between the warfighter and adversaries.

Since its initial fielding to I Marine Expeditionary Force in 2018, the Mk13 has been popular among Marines. The 3rd Battalion, 5th Marines Scout Sniper platoon used the weapon for more than a year in support of the 2025 Sea Dragon Exercise. The new weapon is already the primary sniper rifle used by Marine Corps Forces Special Operations Command, or MARSOC.

Feedback from MCSC’s assessment, MARSOC’s operational use, and 3/5’s testing of the weapon system led to its procurement of the Mk13 for the Corps.

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