Patent ID: 8689478
Filing Date: 2014-04-08
Classification: F41A,F41C,Y10T

Abstract:
1. A modular rifle system comprising: a lower receiver assembly; an upper receiver assembly; and a barrel assembly; wherein the barrel assembly is releasably attached to a first portion of the upper receiver assembly by a barrel nut connector sleeve capable of being tightened by hand, the connector sleeve is prevented from becoming untightened and unconnected during firing of the rifle system by a second portion of the upper receiver assembly, and the second portion of the upper receiver assembly is releasably attached to the barrel assembly and the first portion of the upper receiver assembly, wherein the second portion of the upper receiver assembly is releasably attached to the barrel nut connector sleeve by means of a take-down pin inserted through the second portion of the upper receiver assembly and engaging is receptacle groove in the barrel nut connector sleeve; and wherein the second portion of the upper receiver assembly is releasably coupled to the first portion of the upper receiver assembly by means of an alignment tab and an alignment tab receptacle, wherein the second portion of the upper receiver is prevented from rotating during firing of the rifle system by coupling of the alignment tab and alignment tab receptacle.