JE Machine Tech DPMS Platform Mil-Spec Buffer Tube Black. The detent lock prevents the tube from rotating when firing. Specifications for JE Machine Tech DPMS Platform Mil-Spec Buffer Tube: Manufacturer: JE Machine Tech Color: Black Finish: Anodized Fabric/Material: 6061 Aluminum Gun Make: AR Platform Gun Model: AR-15 Length: 7.15 in Diameter: 1 in Features of JE Machine Tech DPMS Platform Mil-Spec Buffer Tube Detent-lock prevents tube rotation Accepts all Mil-Spec dimension stocks AR-15 & AR-10 compatible Weight: 3.9 oz Package Contents: JE Machine Tech DPMS Platform Mil-Spec Buffer Tube None What firearm models does the manufacturer say JE Machine Tech DPMS Platform Mil-Spec Buffer Tube is compatible with? The manufacturer suggests that JE Machine Tech DPMS Platform Mil-Spec Buffer Tube is compatible with AR-15JE Machine Tech PS-BTM-7075: DPMS Platform Mil-Spec Buffer Tube Black