Guntec USA AR-10/LR-308 Full Size A2 Rifle Buffer Spring Set .308 Cal. 308 Cal Buffer Mil -spec Chrome Silicon .308 Cal Rifle Length Spring Included Specifications for Guntec USA AR-10/LR-308 Full Size A2 Rifle Buffer Spring Set: Manufacturer: Guntec USA Color: Black Gun Make: AR Platform Gun Model: AR-10 Package Contents: Guntec USA AR-10/LR-308 Full Size A2 Rifle Buffer Spring Set What firearm models does the manufacturer say Guntec USA AR-10/LR-308 Full Size A2 Rifle Buffer Spring Set is compatible with? The manufacturer suggests that Guntec USA AR-10/LR-308 Full Size A2 Rifle Buffer Spring Set is compatible with AR-10GUNTEC USA A2BUF+SPR-308: AR-10/LR-308 Full Size A2 Rifle Buffer Spring Set.308 Cal