JE Machine Tech .223 A2 Buffer Tube Combo 5 Pieces Black PS-BTA Combo4. Perfect for retro builds or restorations the included spacer screw provides precise alignment for easy installation. Inspired by Eugene Stoners original design the M16A1/M16A2 rifles introduced reduced recoil and the straight-line buffer system. JE Machine Tech honors that legacy with reliable rifle-length buffer componentsengineered for performance in both classic and modern builds. Specifications for JE Machine Tech .223 A2 Buffer Tube Combo 5 Pieces: Manufacturer: JE Machine Tech Color: Black Finish: Anodized Fabric/Material: 6061 Aluminum Plastic Polymer Gun Make: AR Platform Gun Model: AR-15 Length: 10 in Diameter: 1 in Features of JE Machine Tech .223 A2 Buffer Tube Kit 5 Pieces Buffer Tube Combo Package Contents: JE Machine Tech .223 A2 Buffer Tube Kit 5 Pieces A1 Buffer Tube A2 Rifle Length Buffer Tube Spring Long A2 Buffer Tube Screw A2 Rifle Length Buffer A2 Buffer Tube Spacer What firearm models does the manufacturer say JE Machine Tech .223 A2 Buffer Tube Combo 5 Pieces is compatible with? The manufacturer says that JE Machine Tech .223 A2 Buffer Tube Combo 5 Pieces is compatible with AR-15JE Machine Tech PS-BTA Combo4: .223 A2 Buffer Tube Combo 5 Pieces Black