# US 10,309,747 B2 · Firearm rail/handguard and mounting system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,747 B2 - Document ID: US10309747B2 - Status: Granted - Kind: B2 - Application number: 15/873,299 - Filed: 2018-01-17 - Published: 2018-07-19 - Granted: 2019-06-04 - Earliest claimed: 2017-01-17 - Assignees: Samson Manufacturing Corporation - Applicants: Samson Manufacturing Corp. - Inventors: Scott Samson; Tanner Landis; Andrew Dreher - Web page: https://patentgrep.com/patent/US10309747B2 ## CPC - F41C 23/16: Forestocks; Handgrips; Hand guards (pump-action guns F41C7/02) - F41A 3/66: Breech housings or frames; Receivers - F41A 21/48: Barrel mounting means, e.g. releasable mountings for replaceable barrels - F41C: SMALLARMS, e.g. PISTOLS, RIFLES (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B); ACCESSORIES THEREFOR - F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE ## Abstract An assembly for mounting a handguard to a firearm prevents longitudinal, axial, or radial misalignment relative to the axis of the firearm barrel by utilizing a biasing element disposed intermediate the barrel nut and the interior diameter of the handguard, a clamping element positioned opposite the biasing element about the perimeter of the barrel nut and having a first wedged surface, and a threaded wedge configured to co-act with the first wedged surface of the clamping element to directionally force the clamping element against the barrel nut in a manner that prevents canting of the handguard. ## Claims ### Claim 1 An assembly apparatus for securing a handguard to a firearm having a cylindrical barrel nut, the assembly apparatus comprises: a handguard having a first end with an interior diameter shaped to receive at least a portion of an exterior of the barrel nut thereagainst; a biasing element disposable intermediate the barrel nut and the interior diameter of the handguard, the biasing element having first and second biasing surfaces disposable adjacent first and second exterior surface portions, respectively, of the barrel nut; a mechanism for securing the biasing element intermediate the handguard and the barrel nut, a clamping element having a first wedged surface and disposable intermediate the barrel nut and the interior diameter of the handguard opposite the biasing element about the barrel nut exterior; and a threaded wedge having a second wedged surface configured to co-act with the first wedged surface of the clamping element to force the clamping element against the barrel nut. ### Claim 2 (depends on 1) The apparatus of claim 1 in combination with a cylindrical barrel nut extending along an axis and having an exterior perimeter defining first and second exterior surface portions with different exterior diameter values relative to the axis. ### Claim 3 (depends on 1) The apparatus of claim 1 wherein the biasing element prevents movement of the handguard longitudinally along the axis of the barrel. ### Claim 4 (depends on 1) The apparatus of claim 1 wherein the biasing element has an arcuate surface disposable adjacent the exterior perimeter of the barrel nut to prevent at least one of radial and rotational movement of the handguard first end relative the barrel nut. ### Claim 5 (depends on 1) The apparatus of claim 1 wherein the clamping element has an arcuate surface disposable adjacent the exterior perimeter of the barrel nut to prevent at least one of radial and rotational movement of the handguard first end relative the barrel nut. ### Claim 6 (depends on 1) The apparatus of claim 1 wherein the clamping element further comprises a pair of surfaces adjacent the first wedged surface for retaining a threaded fastener in alignment with the clamping element as the second wedged surface slides against the first wedged surface. ### Claim 7 (depends on 1) The apparatus of claim 1 wherein the threaded wedge further comprises a threaded aperture extending therethrough for receiving a threaded fastener. ### Claim 8 (depends on 1) The apparatus of claim 1 in combination with a threaded fastener extending at least partially through the threaded wedge. ### Claim 9 An assembly kit for use with a firearm having a barrel nut and a handguard, the kit comprising: a biasing element disposable intermediate the barrel nut and an interior diameter of the handguard, the biasing element having first and second biasing surfaces disposed adjacent first and second exterior surface portions, respectively, of the barrel nut; a mechanism for securing the biasing element intermediate the handguard and the barrel nut, a clamping element having a first wedged surface, the clamping element disposable intermediate the barrel nut and the interior diameter of the handguard opposite the biasing element about one of the first and second exterior surface portions of the barrel nut; and a threaded wedge having a second wedged surface configured to co-act with the first wedged surface of the clamping element to directionally force the clamping element against the barrel nut. ### Claim 10 (depends on 9) The assembly kit of claim 9 wherein biasing element has an arcuate surface for positioning adjacent the exterior perimeter of the barrel nut to prevent at least one of radial and rotational movement of the handguard first end relative the barrel nut. ### Claim 11 (depends on 9) The assembly kit of claim 9 wherein the clamping element has an arcuate surface disposable adjacent the exterior perimeter of the barrel nut to prevent at least one of radial and rotational movement of the handguard first end relative the barrel nut. ### Claim 12 (depends on 9) The assembly kit of claim 9 wherein the clamping element further comprises a pair of surfaces adjacent the first wedged surface for retaining a threaded fastener in alignment with the clamping element as the second wedged surface slides against the first wedged surface. ### Claim 13 (depends on 9) The assembly kit of claim 9 wherein the threaded wedge further comprises a threaded aperture extending therethrough for receiving a threaded fastener. ### Claim 14 (depends on 9) The assembly kit of claim 9 in combination with a cylindrical barrel nut extending along an axis and having an exterior perimeter defining first and second exterior surface portions with different exterior diameter values relative to the axis. ### Claim 15 (depends on 9) The assembly kit of claim 9 in combination with a handguard having a first end with an interior diameter shaped to receive at least a portion of a barrel nut exterior thereagainst. ### Claim 16 (depends on 9) The assembly kit of claim 9 in combination with a threaded fastener extending at least partially through the threaded wedge.