JE Machine Tech AR Pistol Buffer Tube Combo Black. This Pistol Buffer Tube from JE Machine Tech comes with a buffer tube buffer spring castle nut end plate and gold for a complete easy install. The JE Machine Tech AR Pistol Buffer Tube Combo Kit is small and lightweight enough to install on a pistol and strong enough for a carbine. You won't be disappointed with the JE Machine Tech Pistol Buffer Tube Combo Kit for your next AR15 pistol build. Specifications for JE Machine Tech AR-15 Pistol Buffer Tube Combo Black: Manufacturer: JE Machine Tech Color: Matte Black Fabric/Material: Aluminum Gun Model: M4 AR-15 Features of JE Machine Tech AR-15 Pistol Buffer Tube Combo Black: 2 3/8 inches Package Contents: JE Machine Tech AR-15 Pistol Buffer Tube Combo Black The J & E Machine Tech Je Ar15 Pistol Buffer Tube Combo Black is a quality addition to the JE Machine Tech lineup. For more great deals on AR15 Buffer Tubes by JE Machine Tech please browse our J & E Machine Tech Gun Parts page. What firearm models does the manufacturer say JE Machine Tech AR-15 Pistol Buffer Tube Combo Black is compatible with? The manufacturer says that JE Machine Tech AR-15 Pistol Buffer Tube Combo Black is compatible with AR-15 M4JE Machine Tech JE Ar15 Pistol Buffer Tube Combo Black