Tacfire AR15 Barrel Assembly Includes Delta Ring Barrel Nut Weld Spring And Barrel Snap Ring Black. These AR15 Lower Parts from the experts at TacFire come with a delta ring barrel nut weld spring and barrel snap ring and the delta ring ensures nothing is slipping off during installation. The Tacfire AR15 Barrel Assembly Kit has everything you need to attach your barrel to your upper receiver. Pick up your Tacfire AR15 Barrel Assembly Set to complete your lower receiver build with precision and style. Specifications for Tacfire AR15 Barrel Assembly: Manufacturer: TacFire Condition: New Color: Black Features of Tacfire AR15 Barrel Assembly: Tacfire AR15 Barrel Assembly Includes Delta Ring Barrel Nut Weld Spring And Barrel Snap Ring Black MAR013 Package Contents: Tacfire AR15 Barrel Assembly Tacfire MAR013: AR15 Barrel Assembly Includes Delta Ring Barrel Nut Weld Spring And Barrel Snap Ring Black