Ergo A2 Grip Plug AR-10 Black. The plug prevents debris from lodging in the cavity of the grip and functions as a shock absorbing pad to protect the grip when setting the rifle down on hard surfaces. Will not fit ERGO overmolded grips. Specifications for Ergo A2 Grip Plugs: Manufacturer: ERGO Color: Black Gun Make: AR Platform Gun Model: AR-10 AR-15 Condition: New Package Contents: Ergo Grip A2 Grip Plug What firearm models does the manufacturer say Ergo A2 Grip Plugs is compatible with? The manufacturer says that Ergo A2 Grip Plugs is compatible with AR-15 AR-10Ergo Grip A2 Grip Plug