Armalite doesn't sell their (Armalite marked) lowers in stripped form (or as complete lowers for that matter). They only sell complete rifles and/or carbines with the Armalite roll stamps. Eagle Arms is in fact a division of Armalite - where they sell these parts. Basically, you are getting the same uppers and lowers - just in stripped or upper/lower half form rather than complete firearms...
hsld.