Dark Storm Industries Mil-Spec Carbine Buffer Tube Black. Developed using several of the most robust and dependable substances available these AR15 Buffer Tubes from Dark Storm Industries offer you a product that will give you many years of dependability. Dark Storm Industries has been generating high-quality products for several years and the Dark Storm Industries Mil-Spec Carbine Buffer Tubes is their manner of revealing how much they care. Specifications for Dark Storm Industries Mil-Spec Carbine Buffer Tubes: Manufacturer: Dark Storm Industries Color: Black Finish: Hard Coat Anodized Fabric/Material: 7075 Aluminum Diameter: 1.15 in Additional Features: Six Position Adjustability Weight: 3.5 oz Features of Dark Storm Industries Mil-Spec Carbine Buffer Tube Six Position Adjustability SOCOM Drain Holes (last 4 positions) CNC Machined Roll Formed Threads Package Contents: Dark Storm Industries Mil-Spec Carbine Buffer Tube Dark Storm Industries DSI-BFR-TUBEM: Mil-Spec Carbine Buffer Tube Black