AT3 Tactical Mil Spec End Plate for AR-15 Red. Perfect for completing a build that might be missing this component or simply having a spare part available for your favorite rifle. This endplate is made of steel and can be properly staked into a castle nut to completely secure your buffer tube on the lower receiver. You can also add a little more color to your black rifle with with your choice of Cerakote finish. Note: Staking an endplate with Cerakote finish will cause the finish to chip in that position. This is unavoidable and we cannot warranty the finish for this application. Specifications for AT3 Tactical Mil Spec End Plate for AR-15: Manufacturer: AT3 Tactical Gun Make: AR Platform Gun Model: AR-15 Condition: New Features of AT3 Tactical Mil Spec End Plate for AR-15 Mil-Spec dimensions Black Phosphate finish or colored Cerakote finishes Fits AR-15 Package Contents: AT3 Tactical Mil Spec End Plate for AR-15 What firearm models does the manufacturer say AT3 Tactical Mil Spec End Plate for AR-15 is compatible with? The manufacturer says that AT3 Tactical Mil Spec End Plate for AR-15 is compatible with AR-15AT3 Tactical BT-EP-MILSPEC-RED: Mil Spec End Plate for AR-15 Red