# US 10,371,474 B2 · Folding buttstock for firearms with recoil assemblies contained within the buttstock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,474 B2 - Document ID: US10371474B2 - Status: Granted - Kind: B2 - Application number: 14/672,402 - Filed: 2015-03-30 - Published: 2015-12-03 - Granted: 2019-08-06 - Earliest claimed: 2011-11-17 - Assignees: Law Tactical, LLC - Applicants: Law Tactical, LLC - Inventors: Hunter Young - Web page: https://patentgrep.com/patent/US10371474B2 ## CPC - F41A 11/04: Articulated or collapsible guns, i.e. with hinged or telescopic parts for transport or storage (breakdown shotguns or rifles F41C7/11; folding or telescopic stocks or stock parts F41C23/04) - F41A 3/84: mounted within the gun stock - F41C 23/04: Folding or telescopic stocks or stock parts (articulated or collapsible guns F41A11/04) - F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE - 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 ## Abstract Certain embodiments described herein are directed to a folding buttstock assembly that comprises collars that can reversibly engage each other. In some instances, one or more collars may comprise a gasket to reduce the likelihood of debris entering into the components of the buttstock assembly or firearm components. In other instances, a wiper or cleaning device may be present to remove debris during operation of the weapon. ## Claims ### Claim 1 A lower receiver comprising a buffer tube folding mechanism comprising: first and second collars hingedly attached to one another, in which the second collar is integral to the lower receiver; first and second closure mechanisms configured to releasably mate, wherein at least one of the first and second closure mechanisms comprises a gasket configured to seal open space between the first and second closure mechanisms when the first and second closure mechanisms are mated to each other; a buffer retainer mechanism configured to partially narrow a circumference of the first collar when the first and second closure mechanisms are not mated; and a mechanism configured to attach the first and second collars to first and second buffer tubes. ### Claim 2 (depends on 1) The lower receiver of claim 1, wherein the buffer retainer mechanism actuates automatically, or the buffer retainer mechanism is manually actuated. ### Claim 3 (depends on 2) The lower receiver of claim 2, wherein the buffer retainer mechanism operates automatically. ### Claim 4 (depends on 1) The lower receiver of claim 1, wherein the buffer retainer mechanism is retracted upon mating the first and second closure mechanisms. ### Claim 5 (depends on 1) The lower receiver of claim 1, wherein the first and second closure mechanisms are manually latched, released, or combinations thereof. ### Claim 6 (depends on 3) The lower receiver of claim 3, wherein the buffer retainer mechanism when open is biased up. ### Claim 7 A lower receiver comprising a folding buttstock comprising: a first buffer tube extending from a second collar, in which the second collar is integral to the lower receiver; a first collar hingedly attached to the second collar; first and second closure mechanisms configured to releasably mate, in which at least one of the first and second closure mechanisms comprises a gasket configured to seal open space between the first and second closure mechanisms when the first and second closure mechanisms are mated to each other; and a buffer retainer mechanism configured to partially narrow a circumference of the first collar. ### Claim 8 (depends on 7) The lower receiver of claim 7, wherein the buffer retainer mechanism actuates automatically, or the buffer retainer mechanism is manually actuated. ### Claim 9 (depends on 8) The lower receiver of claim 8, wherein the buffer retainer mechanism operates automatically. ### Claim 10 (depends on 7) The lower receiver of claim 7, wherein the buffer retainer mechanism is retracted upon mating the first and second closure mechanism. ### Claim 11 (depends on 7) The lower receiver of claim 7, wherein the first and second closure mechanisms are manually latched, released, or combinations thereof. ### Claim 12 (depends on 7) The lower receiver of claim 7, wherein the first buffer tube extends from the first collar into a shoulder stock. ### Claim 13 (depends on 9) The lower receiver of claim 9, wherein the buffer retainer mechanism when open is biased up. ### Claim 14 A firearm comprising an upper receiver and a lower receiver with a folding butt stock coupled to the lower receiver, the firearm comprising: a first collar hingedly attached to a second collar, wherein the second collar is integral to the lower receiver; the first collar attached to a first buffer tube; first and second closure mechanisms configured to releasably mate, wherein at least one of the first and second closure mechanisms comprises a gasket configured to seal open space between the first and second closure mechanisms when the first and second closure mechanisms are mated to each other; and a buffer retainer mechanism configured to partially narrow a circumference of the first collar. ### Claim 15 (depends on 14) The firearm of claim 14, wherein the buffer retainer mechanism actuates automatically, or the buffer retainer mechanism is manually actuated. ### Claim 16 (depends on 15) The firearm of claim 15, wherein the buffer retainer mechanism operates automatically. ### Claim 17 (depends on 14) The firearm of claim 14, wherein the buffer retainer mechanism is retracted upon mating the first and second closure mechanism. ### Claim 18 (depends on 14) The firearm of claim 14, wherein the first and second closure mechanisms are manually latched, released, or combinations thereof. ### Claim 19 (depends on 14) The firearm of claim 14, wherein a second buffer tube is coupled to the first collar, wherein the second buffer tube extends from the first collar into the butt stock to couple the butt stock to the lower receiver. ### Claim 20 (depends on 16) The firearm of claim 16, wherein the buffer retainer mechanism when open is biased up. ### Claim 21 (depends on 1) The lower receiver of claim 1, further comprising a cleaning device coupled to at least one of the first collar and the second collar. ### Claim 22 (depends on 7) The lower receiver of claim 7, further comprising a cleaning device coupled to at least one of the first collar and the second collar. ### Claim 23 (depends on 14) The firearm of claim 14, further comprising a cleaning device coupled to at least one of the first collar and the second collar.