The Wilson Combat 5.56mm Black Bolt Carrier Assembly is a precision-engineered replacement or spare component for 5.56 NATO AR-platform rifles. Built from materials and processes identical to what Wilson Combat uses in their custom rifle builds, this full-auto carrier delivers the reliability serious shooters demand. The bolt is precision-machined from Carpenter No. 158 steel and shot-peened to boost strength, while the carrier body is 8620 steel with a chrome-lined, properly heat-treated Mil-Spec gas key secured with Grade 8 fasteners and staked during final inspection.

Whether you're building a complete rifle, maintaining a duty gun, or keeping a dependable spare on hand, this assembly covers the essentials. The bolt features a tool-steel extractor and ejector per Mil-Spec design, full magnetic particle inspection, and random batch high-pressure testing—the kind of quality control that separates field-proven parts from budget alternatives. The Parkerized external finish and internal chrome-lining ensure longevity in hard use and variable conditions.

The full-auto carrier profile is heavier than semi-auto variants, which can benefit carbine-length and shorter gas systems, suppressed rifles, and short-barreled builds by lowering cyclic rate. Despite the full-auto designation, both carrier types are completely legal to own in a semi-automatic rifle and are fully interchangeable—no restrictions apply. This assembly will work with any quality 5.56 case-head AR, including .223/5.56 NATO, .300 Blackout, .204 Ruger, and 7.62×40 WT platforms.

The Wilson Combat 5.56mm Black Bolt Carrier Assembly is a precision-engineered replacement or spare component for 5.56 NATO AR-platform rifles. Built from materials and processes identical to what Wilson Combat uses in their custom rifle builds, this full-auto carrier delivers the reliability serious shooters demand. The bolt is precision-machined from Carpenter No. 158 steel and shot-peened to boost strength, while the carrier body is 8620 steel with a chrome-lined, properly heat-treated Mil-Spec gas key secured with Grade 8 fasteners and staked during final inspection.

Whether you're building a complete rifle, maintaining a duty gun, or keeping a dependable spare on hand, this assembly covers the essentials. The bolt features a tool-steel extractor and ejector per Mil-Spec design, full magnetic particle inspection, and random batch high-pressure testing—the kind of quality control that separates field-proven parts from budget alternatives. The Parkerized external finish and internal chrome-lining ensure longevity in hard use and variable conditions.

The full-auto carrier profile is heavier than semi-auto variants, which can benefit carbine-length and shorter gas systems, suppressed rifles, and short-barreled builds by lowering cyclic rate. Despite the full-auto designation, both carrier types are completely legal to own in a semi-automatic rifle and are fully interchangeable—no restrictions apply. This assembly will work with any quality 5.56 case-head AR, including .223/5.56 NATO, .300 Blackout, .204 Ruger, and 7.62×40 WT platforms.