Guntec USA AR-15 Mil-Spec Buffer Tube w/End Plate and Castle Nut Flat Dark Earth

Guntec USA AR-15 Mil-Spec Buffer Tube w/End Plate and Castle Nut Flat Dark Earth. End Plate & Castle Nut Included. T6 Aluminum. Six Position. Specifications for Guntec USA AR-15 Mil-Spec Buffer Tube: Manufacturer: Guntec USA Gun Model: AR-15 Condition: New Package Contents: Guntec USA AR-15 Mil-Spec Buffer Tube What firearm models does the manufacturer say Guntec USA AR-15 Mil-Spec Buffer Tube is compatible with? The manufacturer says that Guntec USA AR-15 Mil-Spec Buffer Tube is compatible with AR-15GUNTEC USA MILSPECTUBE-FDE: AR-15 Mil-Spec Buffer Tube w/End Plate and Castle NutFlat Dark Earth