Guntec USA AR-10 Mil-Spec Buffer Tube Set .308 Cal Cerakote Flat Dark Earth. 308 Caliber Specifications for Guntec USA AR-10 Mil-Spec Buffer Tube Set .308 Cal: Manufacturer: Guntec USA Fabric/Material: T6 Aluminum Gun Make: AR Platform Gun Model: AR-10 Condition: New Weight: 10 oz Features of Guntec USA AR-10 Mil-Spec Buffer Tube Set .308 Cal Total Weight of Kit: 10 oz End Plate Castle Nut 308 CAR Short Buffer & Spring Six Position Buffer Tube Package Contents: Guntec USA AR-10 Mil-Spec Buffer Tube Set .308 Cal What firearm models does the manufacturer say Guntec USA AR-10 Mil-Spec Buffer Tube Set .308 Cal is compatible with? The manufacturer suggests that Guntec USA AR-10 Mil-Spec Buffer Tube Set .308 Cal is compatible with AR-10Guntec USA MILTUBESET-308-FDE: AR-10 Mil-Spec Buffer Tube Set .308 Cal Cerakote Flat Dark Earth