JE Machine Tech DPMS Platform Buffer Tube Combo Kit Buffer Tube/Spring/Black Buffer/Castle Nut/End Plate Mil-Spec Black PS-BTM COMBO. Features/Specifications: 5 Pc Combo: DPMS Platform Mil-Spec buffer tube Spring Black buffer Castle nut Standard end plate Specifications for JE Machine Tech DPMS Platform Mil-Spec Buffer Tube Combo Kit: Manufacturer: JE Machine Tech Color: Black Included Accessories: Black Buffer End Plate Spring Buffer Tube Castle Nut Condition: New Features of JE Machine Tech DPMS Platform Mil-Spec Buffer Tube Combo Kit: 5 Pc Combo: DPMS Platform Mil-Spec buffer tube Spring Black buffer Castle nut Standard end plate Package Contents: J&E Machine Tech DPMS Platform Mil-Spec Buffer Tube Combo Kit JE Machine Tech PS-BTM COMBO: DPMS Platform Mil-Spec Buffer Tube Combo Kit Buffer Tube/Spring/Black Buffer/Castle Nut/End Plate Black