Odin Works Enhanced Lower Parts Kit Black Fits AR15. Nitride Coating increases part finish hardness" toughness" and adhesion. Comes with winter trigger guard. Specifications for ODIN Works Enhanced Lower Parts Kit Black Fits AR15: Manufacturer: ODIN Works Color: Black Finish: Black Additional Features: Lower Parts Kit Handle Color: Black Features of ODIN Works Enhanced Lower Parts Kit Black Fits AR15: 31 piece set to complete a lower Package Contents: ODIN Works Enhanced Lower Parts Kit Black Fits AR15