Guntec USA AR-10 .308 A2 Buffer. 308 Rifle Length 5.3 oz Slightly Shorter Than 5.56 A2 Buffer Mil -spec Just Released Specifications for Guntec USA AR-10/LR-308 A2 Buffer: Manufacturer: Guntec USA Color: Gold Fabric/Material: Aluminum Gun Model: AR-10 Length: 4.5 in Weight: 5.3 oz Package Contents: Guntec USA AR-10/LR-308 A2 Buffer What firearm models does the manufacturer say Guntec USA AR-10/LR-308 A2 Buffer is compatible with? The manufacturer suggests that Guntec USA AR-10/LR-308 A2 Buffer is compatible with AR-10GUNTEC USA A2BUF-308: AR-10/LR-308 A2 Buffer.308 Cal