# US 10,871,345 B2 · Pistol chassis and firearm apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,345 B2 - Document ID: US10871345B2 - Status: Granted - Kind: B2 - Application number: 16/252,791 - Filed: 2019-01-21 - Published: 2019-07-25 - Granted: 2020-12-22 - Earliest claimed: 2018-01-23 - Applicants: Sagi Faifer - Inventors: Sagi Faifer - Web page: https://patentgrep.com/patent/US10871345B2 ## CPC - F41C 23/12: Auxiliary stocks for stabilising, or for transforming pistols, e.g. revolvers, into shoulder-fired guns - F41A 3/72: Operating handles or levers; Mounting thereof in breech-blocks or bolts {(F41C7/02, F41C7/06 take precedence)} - F41C 23/04: Folding or telescopic stocks or stock parts (articulated or collapsible guns F41A11/04) - F41C 27/22: Balancing or stabilising arrangements {on the gun itself, e.g. balancing weights} - F41C 33/001: {Shooting harnesses; Stabilising devices, e.g. straps on the body (balancing arrangements on the gun itself F41C27/22)} - 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 A pistol chassis is disclosed which may include a lower housing, an upper housing, a proximal enclosure, a distal sleeve, and a proximal accessory. The distal sleeve, lower housing, and upper housing may be secured together to form a tubular member for receiving a pistol. The lower housing further may include a distal segment, a proximal segment and an intermediate segment. Time distal segment may include a pistol frame receptacle and a trigger guard enclosure. The proximal accessory may be a folding stock. The pistol chassis may house a pistol to produce a firearm apparatus. ## Claims ### Claim 1 A pistol chassis comprising: a lower housing which comprises a distal end and a proximal end, the proximal end being spaced from the distal end along a first longitudinal axis, the lower housing comprises a distal segment comprising a pistol frame receptacle which comprises a starboard side rail and a port side rail, the starboard side rail and the port side rail being configured and dimensioned to interlock with a housed pistol frame to precisely and securely position the housed pistol frame in alignment with the first longitudinal axis, and a trigger guard enclosure which comprises a first wall including a first fastener receiving hole, a second wall spaced from the first wall, the second wall including a second fastener receiving hole, and a third wall disposed between the first wall and the second wall, a trigger guard seat comprising a trigger guard contact surface, a spring guide surface spaced from the trigger guard contact surface, a first side wall, a second side wall, a spring guide extending from the spring guide surface, a compression spring disposed around the spring guide, an elongated slot extending from the first side wall to the second side wall, and a trigger guard retention pin, the trigger guard retention pin being disposed in the first fastener receiving hole, the elongated slot, and the second fastener receiving hole, a proximal segment comprising a blocking element and a track, an intermediate segment situated between the distal segment and proximal segment, the intermediate segment comprising a lower opening for receiving a pistol and a starboard opening for passage of fired ammunition casings, and a proximal enclosure connected to the proximal segment, the proximal enclosure comprising a projection, a clamping surface which is configured and dimensioned to interlock with a pistol grip dovetail, and a proximal latch for selectively locking the proximal enclosure to the intermediate segment, the proximal enclosure being telescopically received on the proximal segment, the projection being positioned in the track, and the clamping surface being disposed opposite the pistol frame receptacle. ### Claim 2 (depends on 1) The pistol chassis of claim 1, further comprising an upper housing. ### Claim 3 (depends on 2) The pistol chassis of claim 2, wherein the upper housing comprises a longitudinal axis, the upper housing comprising an accessory rail and a charging handle track. ### Claim 4 (depends on 3) The pistol chassis of claim 3, wherein the upper housing further comprises a charging handle assembly positioned in the charging handle track. ### Claim 5 (depends on 4) The pistol chassis of claim 4, wherein the charging handle assembly comprises a handle and a rail. ### Claim 6 (depends on 5) The pistol chassis of claim 5, wherein the rail comprises a slide bracket. ### Claim 7 (depends on 6) The pistol chassis of claim 6, wherein the rail comprises an elongated aperture. ### Claim 8 (depends on 7) The pistol chassis of claim 7, wherein the charging handle assembly further comprises a charging handle retention pin, the accessory rail further comprises a retention pin opening, and the charging handle retention pin is disposed in the retention pin opening and the elongated aperture. ### Claim 9 (depends on 2) The pistol chassis of claim 2, further comprising a distal sleeve. ### Claim 10 (depends on 9) The pistol chassis of claim 9, wherein the distal sleeve, lower housing, and upper housing are secured together to form a tubular member for receiving a pistol. ### Claim 11 (depends on 1) The pistol chassis of claim 1, further comprising a proximal accessory connected to the proximal enclosure. ### Claim 12 (depends on 11) The pistol chassis of claim 11, wherein the proximal accessory comprises a butt stock. ### Claim 13 (depends on 12) The pistol chassis of claim 12, wherein the proximal accessory comprises a folding stock. ### Claim 14 (depends on 11) The pistol chassis of claim 11, wherein the proximal accessory comprises an arm stabilizing device. ### Claim 15 (depends on 14) The pistol chassis of claim 14, wherein the proximal accessory comprises an arm support. ### Claim 16 (depends on 15) The pistol chassis of claim 15, wherein the arm support and the pistol chassis form a hinge, and the arm support is selectively movable about the hinge. ### Claim 17 (depends on 1) The pistol chassis of claim 1, wherein the starboard side rail comprises a segment that is aligned parallel to the first longitudinal axis and an angled segment which includes a face that is oblique to the first longitudinal axis. ### Claim 18 (depends on 1) A firearm apparatus comprising: a pistol chassis of claim 1, and a pistol disposed in the lower housing, the pistol contacting the trigger guard seat and the clamping surface. ### Claim 19 A pistol chassis comprising: a lower housing which comprises a distal end and a proximal end, the lower housing comprises a distal segment comprising a pistol frame receptacle, and a trigger guard enclosure, the trigger guard enclosure comprises a first wall including a first fastener receiving hole, a second wall spaced from the first wall, the second wall including a second fastener receiving hole, and a third wall disposed between the first wall and the second wall, a trigger guard seat comprising a trigger guard contact surface, a spring guide surface spaced from the trigger guard contact surface, a first side wall, a second side wall, a spring guide extending from the spring guide surface, a compression spring disposed around the spring guide, an elongated slot extending from the first side wall to the second side wall, a trigger guard retention pin, the trigger guard retention pin being disposed in the first fastener receiving hole, the elongated slot, and the second fastener receiving hole, a proximal segment comprising a blocking element and a track, an intermediate segment situated between the distal segment and proximal segment, the intermediate segment comprising a lower opening for receiving a pistol and a starboard opening for passage of fired ammunition casings, a proximal enclosure connected to the proximal segment, the proximal enclosure comprising a projection, a clamping surface which is configured and dimensioned to interlock with a pistol grip dovetail, and a proximal latch for selectively locking the proximal enclosure to the intermediate segment, the proximal enclosure being telescopically received on the proximal segment, the projection being positioned in the track, and the clamping surface being disposed opposite the pistol frame receptacle, and an upper housing comprising an accessory rail which comprises a retention pin opening, and a charging handle track, and a charging handle assembly positioned in the charging handle track, the charging handle assembly comprising a handle, a rail which comprises a slide bracket and an elongated aperture, and a charging handle retention pin, the charging handle retention pin being disposed in the retention pin opening and the elongated aperture. ### Claim 20 (depends on 19) The pistol chassis of claim 19, further comprising a butt stock connected to the proximal enclosure.