Spikes Tactical Mil-Spec Buffer Tube 6-Position 7075 T6 Aluminum Black. These Spikes Tactical AR15 Buffer Tubes feature a dry film lube that lubricates without the sticky residue leftover by other buffer tubes. In addition the Spikes Tactical Mil-Spec 6-Position Buffer Tube is type III hardcoat anodized to be stronger and more durable than its predecessors. The Spikes Tactical Mil-Spec 7075 T6 Aluminum Buffer Tube is well built smooth and perfect for your next AR build. Specifications for Spikes Tactical Mil-Spec Buffer Tube 6-Position 7075 T6 Aluminum: Manufacturer: Spikes Tactical Color: Black Finish: Black Fabric/Material: 7075-T6 Aluminum Length: 7.25 in Additional Features: Laser Engraved Positions Condition: New Country of Origin: USA Weight: 3.6 oz Spikes Tactical Mil-Spec Buffer Tube 2A8-RBT-SLA500R Dry film lube. Machined from 7075-T6 aluminum. Type III Hardcoat Anodized. Features laser-engraved position numbers. Package Contents: Spikes Tactical Mil-Spec Buffer Tube 6-Position 7075 T6 Aluminum 2A8-RBT-SLA500R Spikes SLA500R Mil-Spec Buffer Tube 6-Position 7075 T6 Aluminum Black