Wilson Combat TR-BCA-SBN-556 AR-15/M16 5.56x45mm NATO Bolt Carrier Assembly - Black Nitride

The Wilson Combat TR-BCA-SBN-556 Bolt Carrier Assembly is a complete bolt-carrier assembly for AR-15/M16-pattern rifles using a 5.56x45mm NATO case head. It is intended as an operating-system component for a rifle build or as a replacement assembly.

This assembly uses an auto-profile, Mil-Spec carrier. The auto-profile designation describes the carrier configuration and does not change a semiautomatic rifle's operating mode. Model-specific construction details identify an aerospace-grade 9310 tool steel bolt and a hardened 8620 steel carrier; assembly specifications also list stainless steel among the materials.

A black nitride finish gives the assembly its black exterior. This Wilson Combat bolt carrier assembly is offered in New Condition.