Forward Controls Design Ejection Port Cover takes the AR’s EPC and gives it some functional improvements. This Twin Dimple model gives the user a tactile way to feel the port open and close, unlike many standard options. When this port cover is in the open position, it sits at an angle that’s further off of the upper making it easier for the user to insert a finger and snap it closed. Forward Controls Design’s ergonomic improvements make your dust cover easier to use and as experienced AR-15 owners know, little improvements can make your rifle much more functional, as well as much more enjoyable to shoot. With the Forward Controls Design Ejection Port Cover you're upgrading an integral part of your rifle's operating system.