Patent ID: 8739450
Filing Date: 2014-06-03
Classification: F41A,Y10T

Abstract:
1. A barrel extension device for use with a firearm for use in changing a caliber of ammunition of a firearm from a first caliber ammunition to a second caliber ammunition comprising: a barrel extension comprising: a body having a first end and a second end, and a cylindrical sidewall extending between the first end and the second end, said cylindrical sidewall defining a cavity, wherein at least a portion of the cylindrical sidewall is threaded internally and configured for attachment to a barrel, wherein the first end of the body is configured to cooperate with a caliber conversion device to enable firing of a firearm when said caliber conversion device is installed in said firearm so that the firearm can shoot the second caliber ammunition, and wherein the first end of the body is shaped not to cooperate with the bolt in the bolt carrier assembly for the first caliber ammunition to the barrel extension preventing firing of the first caliber ammunition from said firearm when said bolt carrier is installed.