Mk11 and M110 Uppers & Parts

Mk11 and M110 Uppers & Parts — Semi-Auto Sniper System Components

The Mk11 Mod 0 and M110 SASS represent the U.S. military's primary semi-automatic sniper platforms for a generation of combat operations. Built on the SR-25/AR-10 pattern, they brought precision engagement capability to special operations units and conventional Army sniper teams at ranges beyond what the standard M4A1 could reach. CCC stocks barrels, uppers, and components for clone-correct Mk11 and M110 builds — the real parts, from the real manufacturers.

Mk11 Mod 0

The Mk11 Mod 0 was the Navy's designation for the Knights Armament SR-25 Mk11 — a 20" semi-automatic rifle chambered in 7.62×51 NATO fielded by SEAL teams and other NSW units. It used a KAC free-float URX rail and was typically paired with a Nightforce or Leupold scope in Mk4 rings. For Mk11 clone builds, the correct components come from Knights Armament, and CCC is the source.

M110 SASS

The M110 Semi-Automatic Sniper System was the Army's successor to the M24 bolt gun for certain roles — a KAC SR-25 based semi-auto with a 20" barrel, detachable suppressor capability (Griffin Armament or KAC QDC), and Leupold Mark 4 optics. CCC has been sourcing M110 components since 2017 and can advise on building a reference-correct M110 SASS.

Building a Mk11 or M110 clone? CCC is the right starting point — we know the correct specifications and we have the parts.