Barrel extension
AssigneeE.R. Shaw, Inc.
InventorRoy Piontek
Life of this patent
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Abstract
The present invention relates to barrel extensions for firearms that have been converted to fire different, most likely lower, caliber ammunition than the firearms were originally designed to accommodate. The present invention in several embodiments is a barrel extension designed to supplement or replace the barrels and/or barrel extensions of firearms that have a sub-caliber conversion installed. Several embodiments of the present invention are configured to be installed on AR15 family rifles with a .22LR ammunition conversion to allow for accurate shooting of the .22LR ammunition through the barrel extension.
Claims17
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.
A kit of parts for installing a barrel extension device in a firearm for use in changing a caliber of ammunition of the firearm from a first caliber ammunition to a second caliber ammunition, the kit comprising:
- a barrel extension, and
- a barrel,
- wherein the barrel extension comprises:
- a body with 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, and
- 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.
A method of installing a barrel extension device in a firearm for use in changing a caliber of ammunition of a firearm from a first caliber ammunition to a second caliber ammunition, the method comprising the steps of:
- providing a kit of parts for installing a barrel extension in a firearm, the kit comprising:
- a barrel extension, and
- a barrel,
- wherein the barrel extension comprises:
- a body with 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,
- attaching the barrel extension to the barrel, and
- attaching the barrel extension to the upper receiver of a firearm.
Dependencies are inferred from the claim text.