This is a Colt 11.5-inch SOCOM-profile stripped barrel from the FBI over-run production lot — a genuine Colt factory barrel originally produced under an FBI contract that exceeded agency requirements and was released to the commercial market. It is new, unfired, and carries the same profile, chrome lining, and chambering specifications as the barrel that went into the FBI's issue Colt M4 carbines.
The SOCOM profile — sometimes called the "government+" or "heavy under the handguard, M4 contour forward of the gas block" — is the barrel shape that solved the original Block I M4 durability problems and became the standard for Colt's military SBR production. The 11.5-inch length is the correct length for a Mk18 Mod 0, an FBI HRT-profile SBR, and the majority of Colt's law-enforcement Commando variants. Chambered 5.56 NATO with a 1:7 twist and chrome-lined bore and chamber, it's built to run hot and stay accurate over long service lives.
Charlie's Custom Clones has these FBI over-run SOCOM barrels in stock — genuine Colt, serialized against the production lot. Order yours today for the cornerstone of your next SBR build.
Potomac Armory