Guntec USA AR-15 A2 Buffer Spring Set .223

Guntec USA AR-15 A2 Buffer Spring Set .223. 223 Cal Mil -spec Rifle Length Spring Included Specifications for Guntec USA AR-15 A2 Buffer Spring Set: Manufacturer: Guntec USA Color: Black Gun Make: AR Platform Gun Model: AR-15 Condition: New Package Contents: Guntec USA AR-15 A2 Buffer Spring Set What firearm models does the manufacturer say Guntec USA AR-15 A2 Buffer Spring Set is compatible with? The manufacturer says that Guntec USA AR-15 A2 Buffer Spring Set is compatible with AR-15GUNTEC USA A2BUF+SPR: AR-15 A2 Buffer Spring Set.223