# US 11,306,990 B2 · Systems and methods for coupling a barrel and handguard to a firearm > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,990 B2 - Document ID: US11306990B2 - Status: Granted - Kind: B2 - Application number: 16/694,617 - Filed: 2019-11-25 - Published: 2020-09-10 - Granted: 2022-04-19 - Earliest claimed: 2019-03-05 - Assignees: Shilen Rifles, Inc. - Applicants: Shilen Rifles, Inc. - Inventors: Robert Wade Hull - Web page: https://patentgrep.com/patent/US11306990B2 ## CPC - F41A 21/482: {using continuous threads on the barrel} - F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE ## Abstract Systems and methods for coupling a barrel to a firearm are disclosed, including firearms incorporating the systems. In an embodiment, the firearm includes a receiver including a cavity and an internal thread disposed within the cavity. In addition, the firearm includes a barrel including a first threaded connector that is threadably engaged with the internal thread within the cavity and a second threaded connector. Further, the firearm includes a barrel nut including an internal thread and an external thread. The internal thread of the barrel nut is threadably engaged with the second threaded connector of the barrel. ## Claims ### Claim 1 A firearm, comprising: a receiver comprising a cavity and an internal thread disposed within the cavity; a barrel comprising a first threaded connector that is threadably engaged with the internal thread within the cavity and a second threaded connector spaced from the first threaded connector; and a barrel nut comprising an internal thread and an external thread, wherein the internal thread of the barrel nut is threadably engaged with the second threaded connector of the barrel. ### Claim 2 (depends on 1) The firearm of claim 1, wherein the barrel comprises a central axis, a first end, and a second end, wherein the first threaded connector and the second threaded connector are each disposed more axially proximate the second end than the first end. ### Claim 3 (depends on 2) The firearm of claim 2, wherein the first threaded connector includes a first axial length and the second threaded connector includes a second axial length, and wherein the first axial length is different from the second axial length. ### Claim 4 (depends on 2) The firearm of claim 2, wherein the first threaded connector has a first external barrel thread, and the second threaded connector has a second external barrel thread, wherein the first external barrel thread is different from the second external barrel thread. ### Claim 5 (depends on 4) The firearm of claim 4, wherein the first external barrel thread has a first major diameter and the second thread has a second major diameter, wherein the first major diameter is smaller than the second major diameter. ### Claim 6 (depends on 5) The firearm of claim 5, further comprising a cylindrical surface extending axially from the first external barrel thread of the first threaded connector to the second external barrel thread of the second threaded connector. ### Claim 7 (depends on 1) The firearm of claim 1, wherein the barrel nut comprises a first end and a second end opposite the first end, wherein the internal thread of the barrel nut is more proximate the second end than the first end. ### Claim 8 (depends on 7) The firearm of claim 7, wherein the external thread of the barrel nut is more proximate the second end than the first end. ### Claim 9 (depends on 8) The firearm of claim 8, wherein the barrel nut further comprises a plurality of circumferentially spaced recesses extending radially inward to a radially outer surface of the barrel nut. ### Claim 10 (depends on 9) The firearm of claim 9, wherein the recesses extend axially from the first end of the barrel nut. ### Claim 11 (depends on 1) The firearm of claim 1, further comprising a handguard disposed about the barrel and including an internal thread that is threadably engaged with the external thread of the barrel nut. ### Claim 12 A firearm, comprising: a receiver comprising a cavity and an internal thread disposed within the cavity; a barrel comprising a first threaded connector that is threadably engaged with the internal thread within the cavity and a second threaded connector, wherein the first threaded connector comprises a first external barrel thread, and the second threaded connector comprises a second external barrel thread that is different from the first external barrel thread; and a barrel nut comprising an internal thread, wherein the internal thread of the barrel nut is threadably engaged with the second threaded connector of the barrel. ### Claim 13 (depends on 12) The firearm of claim 12, wherein the barrel comprises a central axis, a first end, and a second end, wherein the first threaded connector and the second threaded connectors are each disposed more axially proximate the second end than the first end. ### Claim 14 (depends on 13) The firearm of claim 13, wherein the first threaded connector includes a first axial length and the second threaded connector includes a second axial length, and wherein the first axial length is different from the second axial length. ### Claim 15 (depends on 13) The firearm of claim 13, wherein the first external barrel thread has a first major diameter and the second thread has a second major diameter, wherein the first major diameter is smaller than the second major diameter. ### Claim 16 (depends on 15) The firearm of claim 15, wherein the barrel nut comprises a first end and a second end opposite the first end of the barrel nut, wherein the internal thread of the barrel nut is more proximate the second end of the barrel nut than the first end of the barrel nut. ### Claim 17 (depends on 16) The firearm of claim 16, wherein the barrel nut further comprises a plurality of circumferentially spaced recesses extending radially inward to a radially outer surface of the barrel nut, and extending axially from the first end of the barrel nut.