Fortis Manufacturing AR-15 Enhanced Stainless Steel Bolt Catch Nitride Black. Easily installs in seconds and instantly upgrades your rifle. This upgrade is CNC machined from a solid piece of Stainless Steel Black Nitride Coated. Specifications for Fortis Manufacturing AR-15 Enhanced Stainless Steel Bolt Catch Nitride: Manufacturer: Fortis Manufacturing Gun Model: AR-15 Fabric/Material: Stainless Steel Color: Black Finish: Black Nitride Hand: Ambidextrous Package Contents: Fortis Manufacturing AR-15 Enhanced Stainless Steel Bolt Catch Nitride What firearm models does the manufacturer say Fortis Manufacturing AR-15 Enhanced Stainless Steel Bolt Catch Nitride is compatible with? The manufacturer says that Fortis Manufacturing AR-15 Enhanced Stainless Steel Bolt Catch Nitride is compatible with AR-15Fortis Manufacturing AR15-EBC-SS-BN: AR-15 Enhanced Stainless Steel Bolt Catch Nitride Black