Billet Ultimate Dust Cover-223 Blue Package includes: – 1x Billet ultimate dust cover – 1x Pack of 4 rubber pads Features: – Available in Red, Blue, FDE, and Black – Quick and easy installation/removal – Built in double seal for improved debris prevention – Solid Billet Aluminum construction for durability *Will not properly fit Aero Precision M4E1 upper receivers. * Will not properly function with the Lantac E-BCG due to carrier and bolt design.