Patent ID: 8844423
Filing Date: 2014-09-30
Classification: F41A

Abstract:
1. A method of assembling an upper receiver comprising the steps of: a. identifying an upper receiver having a barrel attached thereto where the upper receiver has a surface defining an interior chamber with longitudinal forward and rearward regions; b. vertically positioning a bolt into an opening in the longitudinal rearward region of the interior chamber and longitudinally sliding the bolt into the longitudinal forward region of the interior chamber; c. positioning a backer plate into the longitudinal rearward region of the interior chamber of the upper assembly rearward of the bolt; d. longitudinally positioning a recoil spring guide through a surface defining a spring guide passage in the longitudinal rearward region of the upper receiver; e. positioning the recoil spring guide through a surface defining a recoil guide rod chamber in the bolt; f. positioning the recoil spring guide relative to the backer plate; g. threading a retaining plug to a threaded recess in the upper receiver, wherein the threaded recess is coaxial to the recoil spring guide, wherein the rearward end of the recoil spring guide is retained within the retaining plug; and h. removably attaching the backer plate to the upper receiver such that it moves therewith.