Wilson Combat TRBCA 5.56x45mm NATO Full-Auto Profile Bolt Carrier Assembly - Black Parkerized

The Wilson Combat TRBCA Bolt Carrier Assembly is a drop-in replacement bolt carrier group for AR-pattern rifles using the 5.56x45mm NATO case head. It is part of Wilson Combat's 5.56 NATO series, and its full-auto-profile carrier provides the external profile and reciprocating mass associated with that configuration.

This assembly uses steel construction with Carpenter 158 material specified and shot-peening for increased strength. It includes a tool-steel extractor and ejector with the appropriate extractor spring. A black Parkerized finish completes the assembly.

The heavier carrier mass can reduce cyclic rate and is particularly useful with carbine-length or shorter gas systems, short-barreled rifles, suppressed rifles, and machine guns. The full-auto designation describes the carrier profile and weight; the component alone does not make a rifle fully automatic.

Wilson Combat subjects this model to random batch high-pressure testing (HPT). This replacement bolt carrier assembly is offered in New condition.