Spikes Tactical Pistol Buffer Tube Extended w/ Step and QD Socket. This buffer tube also features a QD attachment point at the rear and uses a carbine buffer and spring. Specifications for Spikes Tactical Pistol Buffer Tube w/ Step and QD Socket: Manufacturer: Spikes Tactical Color: Black Fabric/Material: Aluminum Length: 9.25 in Diameter: 1.2 in Included Accessories: Quick Disconnect Attachment Point in the Rear Condition: New Country of Origin: USA Features of Spikes Tactical Pistol Buffer Tube: Quick Disconnect Attachment Point in the Rear Package Contents: Spikes Tactical Pistol Buffer Tube w/ Step and QD Socket Spikes Tactical SLA500PE: Pistol Buffer Tube Extended w/ Step and QD Socket