VISM AR15 Aluminum Buffer Tube Black. Designed to fit MIL-SPEC collapsible buttstocks.Made of precision machined aircraft grade aluminum for durability.Black Hard anodized finish.AR buffer and buffer spring not included. Specifications for VISM AR15 Aluminum Buffer Tube: Manufacturer: VISM Color: Black Finish: Matte Black Fabric/Material: Aluminum Gun Make: AR Platform Gun Model: AR-15 Buffer Tube Size: Mil-Spec Blade Finish: Matte Case Finish: Matte Features of NcSTAR Buffer Tube and Castle Nut For AR-15 Mil-Spec Anodized Finish Black: 6 Position Package Contents: VISM AR15 Aluminum Buffer Tube What firearm models does the manufacturer say VISM AR15 Aluminum Buffer Tube is compatible with? The manufacturer says that VISM AR15 Aluminum Buffer Tube is compatible with AR-15VISM VG137: AR15 Aluminum Buffer Tube Black