# US 9,003,684 B2 · Compact survival firearm > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,003,684 B2 - Document ID: US9003684B2 - Status: Granted - Kind: B2 - Application number: 14/011,234 - Filed: 2013-08-27 - Published: 2015-03-05 - Granted: 2015-04-14 - Earliest claimed: 2013-08-27 - Applicants: Tim Shawn Bero - Inventors: Tim Shawn Bero - Web page: https://patentgrep.com/patent/US9003684B2 ## CPC - F41A 3/66: Breech housings or frames; Receivers - F41A 3/68: Bolt stops, i.e. means for limiting bolt opening movement - F41A 3/72: Operating handles or levers; Mounting thereof in breech-blocks or bolts {(F41C7/02, F41C7/06 take precedence)} - F41A 11/00: Assembly or disassembly features; Modular concepts; Articulated or collapsible guns (F41A3/64, F41A19/10 - F41A19/15, F41A21/48, F41A25/26 take precedence) - F41A 17/46: Trigger safeties, i.e. means for preventing trigger movement (F41A17/02 - F41A17/40 take precedence) - F41A 21/48: Barrel mounting means, e.g. releasable mountings for replaceable barrels - F41A 21/484: {using interlocking means, e.g. by sliding pins} - F41A 21/485: {using screws or bolts} - F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE ## Abstract A compact survival firearm is a rifle having an upper receiver body, a lower receiver body removably connectable to the upper receiver body and defining a transverse bore adapted to closely receive a takedown pin, a fastener connected to the upper receiver body and having a protruding portion protruding therefrom, the lower receiver body defining a space sized to closely receive the fastener, the protruding portion of the fastener having an end portion of a first width, and an intermediate portion of a second width less than the first width, and the space at least partially intersecting the transverse bore such that the intermediate portion of the fastener is clear of the bore to permit the presence of the takedown pin, and the end portion of the fastener prevents separation of the upper receiver from the lower receiver when a takedown pin is present in the bore. ## Claims ### Claim 1 A rifle comprising: an upper receiver body; a lower receiver body removably connectable to the upper receiver body and defining a transverse bore adapted to receive a takedown pin; a fastener threadedly connected to the upper receive body and having a protruding portion protruding therefrom, such that an amount the protruding portion protrudes is adjustable by rotating the fastener; the lower receiver body defining a space sized to closely receive the fastener; the protruding portion of the fastener having an end portion of a first width, and an intermediate portion of a second width less than the first width; and the space at least partially intersecting the transverse bore such that the intermediate portion of the fastener is clear of the bore to permit the presence of the takedown pin, and the end portion of the fastener prevents separation of the upper receiver from the lower receiver when a takedown pin is present in the bore; and wherein the contact between the end portion of the fastener and the takedown pin provides an adjustable tightness between the upper and lower receiver bodies based on a rotational position of the fastener. ### Claim 2 (depends on 1) The rifle of claim 1 wherein the upper receiver is formed of a first material, and the fastener is formed of a different material. ### Claim 3 (depends on 1) The rifle of claim 1 wherein the fastener is formed of a harder material than the upper receiver. ### Claim 4 (depends on 1) The rifle of claim 1 wherein the fastener is formed of a denser material than the upper receiver. ### Claim 5 (depends on 1) The rifle of claim 1 wherein the upper receiver is formed of a material selected from the group including aluminum and plastic, and the fastener is formed of steel. ### Claim 6 (depends on 1) The rifle of claim 1 wherein the fastener has a toroidal intermediate portion. ### Claim 7 (depends on 6) The rifle of claim 6 wherein the toroidal intermediate portion has a radius equal to the radius of the transverse bore. ### Claim 8 (depends on 1) The rifle of claim 1 wherein the fastener has a free end face with a tool-engagement feature. ### Claim 9 (depends on 1) The rifle of claim 1 wherein the intermediate portion is shaped to closely receive a portion of the takedown pin. ### Claim 10 (depends on 1) The rifle of claim 1 wherein the space is a cylindrical bore and the fastener includes a cylindrical portion received by the cylindrical bore and sharing a common axis. ### Claim 11 (depends on 10) The rifle of claim 10 wherein the common axis is perpendicular to the transverse bore. ### Claim 12 (depends on 1) The rifle of claim 1 wherein the fastener is adjustable to provide an adjustable protrusion amount, such that the tightness of fit between the upper receiver and lower receiver is adjustable. ### Claim 13 A rifle comprising: an upper receiver body having an exterior surface including a threaded bore; a screw having a threaded end received by the threaded bore and an opposing end the opposing end protruding from the exterior surface, such that an amount the opposing end protrudes is adjustable by rotating the screw; the opposing end having a toroidal neck section that creates a reduced diameter portion defining a ledge; a lower receiver body having an exterior surface including a bore; the lower receiver body having a cross pin hole in communication with the bore; a cross pin received within the cross pin hole; and wherein the lower receiver bore receives the opposing end of the screw such that the ledge extends beneath the cross pin when the lower receiver body is in an attached position; wherein a line of contact exists between the cross pin and the toroidal neck section of the screw when the lower receiver is in the attached position; and wherein the contact between the cross pin and the toroidal neck section of the screw provides an adjustable tightness between the upper and lower receiver bodies based on a rotational position of the screw. ### Claim 14 (depends on 13) The rifle of claim 13 wherein the opposing end of the screw includes a tool engagement feature. ### Claim 15 (depends on 13) The rifle of claim 13 wherein the exterior surface of the upper receiver is cylindrical and the exterior surface of the lower receiver forms a cylindrical cradle surface that closely abuts the cylindrical exterior surface when the lower receiver is in the attached position. ### Claim 16 (depends on 13) The rifle of claim 13 wherein the neck section of the screw has an adjustable position relative to the exterior surface of the upper receiver body determined by the extent to which the threaded end is screwed into the threaded bore. ### Claim 17 (depends on 13) The rifle of claim 13 wherein the cross pin hole is perpendicular to the bore in the lower receiver. ### Claim 18 (depends on 13) The rifle of claim 13 wherein the exterior surface of the upper receiver is a bottom surface and the exterior surface of the lower receiver is a top surface. ### Claim 19 (depends on 13) The rifle of claim 13 wherein the cross pin hole is offset to one side of the bore in the lower receiver such that only a portion of one side of the cross pin protrudes into the bore. ### Claim 20 (depends on 19) The rifle of claim 19 wherein cross pin has a selected diameter and the bore is offset such that the protruding portion of the cross pin closely abuts the neck section of the screw when the lower receiver is in the attached position.