Firearms with electronic ignitions have a frame defining an ammunition receptacle having an open lower end and a closed upper end and opposed lateral sidewalls, a plurality of barrels connected to the frame, each barrel having a rear end aperture providing communication with the ammunition receptacle, an ammunition cartridge adapted to be closely and removably received in the ammunition receptacle in an operation position between the opposed lateral sidewalls, the ammunition cartridge having a plurality of ammunition elements, and each ammunition element being registered with a corresponding one of the barrels. Each ammunition element may include a chamber tube element containing propellant and projectile. Each chamber tube element may include a pressure containment member adapted to contain pressures associated with discharge. Each barrel may define a barrel axis, and the barrel axes may be parallel to each other. The ammunition receptacle may be an elongated passage.

Firearms with electronic ignitions have a frame defining an ammunition receptacle having an open lower end and a closed upper end and opposed lateral sidewalls, a plurality of barrels connected to the frame, each barrel having a rear end aperture providing communication with the ammunition receptacle, an ammunition cartridge adapted to be closely and removably received in the ammunition receptacle in an operation position between the opposed lateral sidewalls, the ammunition cartridge having a plurality of ammunition elements, and each ammunition element being registered with a corresponding one of the barrels. Each ammunition element may include a chamber tube element containing propellant and projectile. Each chamber tube element may include a pressure containment member adapted to contain pressures associated with discharge. Each barrel may define a barrel axis, and the barrel axes may be parallel to each other. The ammunition receptacle may be an elongated passage.

Embodiments of the invention include a firearm system and method of assembly of the firearm system including a receiver complex including a receiver coupled to a forward receiver. A feed port is positioned between the receiver and the forward receiver, and a striker coil assembly is positioned proximate the receiver, and includes a plurality of strikers each extending at least partially through a coil. An interchangeable barrel is coupled to the forward receiver forming a breech. In some embodiments, the firearm system includes a breech that includes a plurality of side-by-side bores of the barrel. Some embodiments include a magazine coupled to the receiver complex adjacent the feedport to simultaneously feed more than one dischargeable projectile into the feedport with a single charge block. In some embodiments, the charge block includes a plurality of chambers and a plurality of projectiles positioned within the plurality of chambers.

Embodiments of the invention include a firearm system and method of assembly of the firearm system including a receiver complex including a receiver coupled to a forward receiver. A feed port is positioned between the receiver and the forward receiver, and a striker coil assembly is positioned proximate the receiver, and includes a plurality of strikers each extending at least partially through a coil. An interchangeable barrel is coupled to the forward receiver forming a breech. In some embodiments, the firearm system includes a breech that includes a plurality of side-by-side bores of the barrel. Some embodiments include a magazine coupled to the receiver complex adjacent the feedport to simultaneously feed more than one dischargeable projectile into the feedport with a single charge block. In some embodiments, the charge block includes a plurality of chambers and a plurality of projectiles positioned within the plurality of chambers.

A test fixture is provided for evaluating structural response of a sample to blast pressure from a muzzle of a gas gun. The fixture includes an adapter, an annular flange, a gauge assembly and a target assembly. The adapter has a proximal rim and an expansion tube. The rim attaches to the muzzle to direct the blast pressure into the tube towards an exit opposite the rim. The annular flange has a ring and a shim that attaches to the tube at the exit. The gauge assembly contains the sample between upstream and downstream stress gauges. The target assembly contains the gauge assembly. The target assembly includes front and rear annular plates connecting coaxially in parallel. The rear annular plate connects to the ring. The tube carries the blast pressure through the exit to strike the gauge assembly for the stress gauges to measure stress from the blast pressure. The ring includes first circumferentially distributed through-holes substantially parallel to the flange's symmetry axis and second circumferentially distributed mutually parallel through-holes angularly offset from the symmetry axis for mounting the rear plate to the ring either coaxially or at an oblique angle.

A test fixture is provided for evaluating structural response of a sample to blast pressure from a muzzle of a gas gun. The fixture includes an adapter, an annular flange, a gauge assembly and a target assembly. The adapter has a proximal rim and an expansion tube. The rim attaches to the muzzle to direct the blast pressure into the tube towards an exit opposite the rim. The annular flange has a ring and a shim that attaches to the tube at the exit. The gauge assembly contains the sample between upstream and downstream stress gauges. The target assembly contains the gauge assembly. The target assembly includes front and rear annular plates connecting coaxially in parallel. The rear annular plate connects to the ring. The tube carries the blast pressure through the exit to strike the gauge assembly for the stress gauges to measure stress from the blast pressure. The ring includes first circumferentially distributed through-holes substantially parallel to the flange's symmetry axis and second circumferentially distributed mutually parallel through-holes angularly offset from the symmetry axis for mounting the rear plate to the ring either coaxially or at an oblique angle.

A double barrel adjustment assembly includes first and second barrel receiving members, each of which is formed with a bore for passing therethrough a barrel of a weapon. The first and second barrel receiving members are formed with complementary surfaces. The double barrel adjustment assembly further includes rotatable first and second adjustment members. One end of the first adjustment member is rotatingly mounted in the second barrel receiving member and an opposite end of the first adjustment member is rotatingly mounted in the first barrel receiving member. One end of the second adjustment member is rotatingly mounted in the first barrel receiving member and an opposite end of the second adjustment member is rotatingly mounted in the second barrel receiving member.

A double barrel adjustment assembly includes first and second barrel receiving members, each of which is formed with a bore for passing therethrough a barrel of a weapon. The first and second barrel receiving members are formed with complementary surfaces. The double barrel adjustment assembly further includes rotatable first and second adjustment members. One end of the first adjustment member is rotatingly mounted in the second barrel receiving member and an opposite end of the first adjustment member is rotatingly mounted in the first barrel receiving member. One end of the second adjustment member is rotatingly mounted in the first barrel receiving member and an opposite end of the second adjustment member is rotatingly mounted in the second barrel receiving member.

A mount part for a weapon barrel in a weapon barrel holder having a tubular inner diameter which comprises a first section and an encircling ring-shaped second section which is of greater outer diameter than the first section and than a following third section. The third section has at least one slot. The at least one slot runs substantially perpendicular to the second section. In a particular usage situation, the ring-shaped section has circumferential bevels. This permits usage in a barrel mounting of a multi-barrelled weapon having multiple weapon barrels mounted in a common barrel mounting.

A mount part for a weapon barrel in a weapon barrel holder having a tubular inner diameter which comprises a first section and an encircling ring-shaped second section which is of greater outer diameter than the first section and than a following third section. The third section has at least one slot. The at least one slot runs substantially perpendicular to the second section. In a particular usage situation, the ring-shaped section has circumferential bevels. This permits usage in a barrel mounting of a multi-barrelled weapon having multiple weapon barrels mounted in a common barrel mounting.