Fortis Manufacturing Milspec C-158 M16 Bolt Carrier Group Black. Designed with the discerning shooter in mind this carrier assembly sets the standard for quality and precision in firearm components. Specifications for Fortis Manufacturing Milspec C-158 M16 Bolt Carrier Group: Manufacturer: Fortis Manufacturing Color: Black Fabric/Material: Steel Gun Model: M16 Hand: Right Condition: New Package Contents: Fortis Manufacturing Milspec C-158 M16 Bolt Carrier Group What firearm models does the manufacturer say Fortis Manufacturing Milspec C-158 M16 Bolt Carrier Group is compatible with? The manufacturer suggests that Fortis Manufacturing Milspec C-158 M16 Bolt Carrier Group is compatible with M16Fortis Manufacturing M16-BCG: Milspec C-158 M16 Bolt Carrier Group Black