Optic: Best Scope available Scope availability greatly depends on which Assault Rifle you prefer. All of the scopes greatly enhance the already significant advantage the Assault Rifle provides by providing greater accuracy for further range. It goes without saying that the 4x and 6x scopes are your best option. Barrel: No Attachment Needed If an attachment is needed/wanted then use a Flash Suppressor. This will not have a negative effect on the damage your Assault Rifle can do however it will have a minor accuracy penalty while in Full Auto making controlled burst optimal. Rail: Laser Sight