Breaching tool
View Patent ↗A receiver assembly for a breaching tool has an upper receiver with female fittings in the form of side flanges at the front and back that connect to the lower receiver's male fittings in the form of a front center post and back sidewalls. The post fits between the front side flanges and the back sidewalls fit between the back side flanges. Apertures in the front side flanges are aligned with an aperture in the center post, and apertures in the back sidewalls align with the back side flanges, and takedown pins extend through the aligned apertures. The flanges can include cutback angles which engage with a front riser in the lower receiver's sidewalls and with rear bosses extending outward from the lower receivers sidewalls. A protrusion in the upper receiver's magazine well only allows a magazine with a notch at its top, front end to engage with the well.
1 . A receiver assembly for a semiautomatic breaching gun, comprising:
a lower receiver comprising a pair of sidewalls extending from a front section to a back section and a post extending upward at the front section, wherein an open space is located between the pair of sidewalls at the front section, wherein the post comprises a first aperture, and wherein the sidewalls at the back section each comprise a second aperture;
an upper receiver comprising a first pair of side flanges, a second pair of side flanges, and a magazine well between the first pair of side flanges, wherein the first pair of side flanges extend downward from a bottom side to a distal end and engage with a topside of the sidewalls at the front section of the lower receiver, wherein the second pair of side flanges extend downward from the bottom side and at least partially extend over the sidewalls of the lower receiver at the back section, wherein the first pair of side flanges comprise a first pair of apertures aligned with the first aperture in the post, and the wherein second pair of side flanges comprise a second pair of apertures aligned with the second aperture in each of the sidewalls; and
a magazine with a top section extending through the open space between the pair of sidewalls in the lower receiver and engaged with the magazine well in the upper receiver.
2 . The receiver assembly of claim 1 , wherein the topside of each of the sidewalls at the front section of the lower receiver is comprised of a lower topside, an upper topside, and a riser extending between the lower topside and the upper topside, wherein the first pair of side flanges are each further comprised of a back edge extending between the bottom side and the distal end, and wherein the back edge contacts the riser.
3 . The receiver assembly of claim 2 , wherein the riser intersects with the upper topside at a first acute angle to form a first pointed edge, and wherein the back edge intersects with the distal end at a second acute angle to form a second pointed edge.
4 . The receiver assembly of claim 3 , wherein the first acute angle is equal to the second acute angle, wherein the first pointed edge is wedged between the back edge of the first pair of side flanges and the bottom side, and wherein the second pointed edge is wedged between the riser and the lower topside.
5 . The receiver assembly of claim 2 , wherein the back section of the lower receiver is further comprised of a pair of bosses extending outwardly from the sidewalls away from the open space, and wherein the second pair of side flanges respectively contact the pair of bosses.
6 . The receiver assembly of claim 5 , wherein the pair of bosses are further comprised of an angled front face, wherein the second pair of side flanges are further comprised of an angled back face, and wherein the angled front face and the angled back face are mated against each other.
7 . The receiver assembly of claim 1 , wherein the upper receiver is further comprised of a protrusion extending from a location proximate to the first pair of apertures back into the magazine well, wherein a topmost portion in the top section of the magazine is comprised of a notch, and wherein the topmost portion of the magazine with the notch extends past the protrusion into the magazine well.
8 . The receiver assembly of claim 1 , further comprising a propulsion assembly with a spring assembly and a handguard connected to a front end of the upper receiver.
9 . The receiver assembly of claim 8 , wherein the front end of the upper receiver is threaded.
10 . The receiver assembly of claim 8 , further comprising a shoulder stock assembly connected to a back edge of the lower receiver.
11 . A receiver assembly for a semiautomatic breaching gun, comprising:
a lower receiver comprising a pair of sidewalls extending from a front section to a back section and a post extending upward at the front section, wherein an open space is located between the pair of sidewalls at the front section, wherein the post comprises a first aperture, and wherein the sidewalls at the back section each comprise a second aperture;
an upper receiver comprising a first pair of side flanges, a second pair of side flanges, a magazine well between the first pair of side flanges, and a protrusion extending partially over the magazine well, wherein the first pair of side flanges extend downward from a bottom side to a distal end and engage with a topside of the sidewalls at the front section of the lower receiver, wherein the second pair of side flanges extend downward from the bottom side and at least partially extend over the sidewalls of the lower receiver at the back section, wherein the first pair of side flanges comprise a first pair of apertures aligned with the first aperture in the post, wherein the second pair of side flanges comprise a second pair of apertures aligned with the second aperture in each of the sidewalls, and wherein the protrusion extends back from a location proximate to the first pair of apertures; and
a magazine with a top section extending through the open space between the pair of sidewalls in the lower receiver, wherein a topmost portion in the top section of the magazine is comprised of a notch, and wherein the topmost portion of the magazine with the notch extends past the protrusion into the magazine well.
12 . The receiver assembly of claim 11 , wherein the topside of each of the sidewalls at the front section of the lower receiver is comprised of a lower topside, an upper topside, and a riser extending between the lower topside and the upper topside, wherein the first pair of side flanges are each further comprised of a back edge extending between the bottom side and the distal end, and wherein the back edge contacts the riser.
13 . The receiver assembly of claim 12 , wherein the riser intersects with the upper topside at a first acute angle to form a first pointed edge, and wherein the back edge intersects with the distal end at a second acute angle to form a second pointed edge.
14 . The receiver assembly of claim 13 , wherein the first acute angle is equal to the second acute angle, wherein the first pointed edge is wedged between the back edge of the first pair of side flanges and the bottom side, and wherein the second pointed edge is wedged between the riser and the lower topside.
15 . The receiver assembly of claim 12 , wherein the back section of the lower receiver is further comprised of a pair of bosses extending outwardly from the sidewalls away from the open space, and wherein the second pair of side flanges respectively contact the pair of bosses.