Abstract: A breech assembly for a weapon may include a breech ring and a carrier fixed to a shaft. The shaft may be rotatably mounted to the breech ring. A breech block may be fixed to the carrier and insertable into and out of an opening in the breech ring by rotating the shaft. A notch may be formed in an end of the shaft. A lock may be translatably disposed in the breech ring and translatable into and out of the notch in the end of the shaft. Translation of the lock into the notch may rotatably lock the shaft with respect to the breech ring.

Abstract: A firing pin position indicator may be mounted to the breech end of a weapon. The indicator may include a solenoid with a plunger and a firing pin adapter that is selectively engageable with the plunger. The firing pin adapter may be fixed to the firing pin of the weapon. The solenoid plunger may be coupled to a quick-release lock. The quick-release lock may be selectively engageable with the firing pin adapter. The quick-release lock may include a housing and a spring-loaded piston that is translatable in the housing. The quick-release lock housing may be coupled to the solenoid plunger with a pin. A sensor may sense the position of the solenoid plunger and may provide a control signal to the weapon.

Abstract: A breech-loaded weapon may include a carrier at its breech end. The carrier may include a breech block support. A screw block may be rotatable on the breech block support of the carrier. The carrier may include a supporting protuberance and the screw block may include a supporting projection having an undercut portion. A spring-loaded plunger may be disposed on the carrier and a plunger recess may be defined in the screw block. In a retained position of the screw block, the undercut portion of the supporting projection may engage the supporting protuberance of the carrier and the spring-loaded plunger may engage the plunger recess.

Abstract: The breech end of a gun may include a quick-release spindle assembly. A carrier may have a locking collar rotatably disposed therein. The locking collar may have a through-bore and one or more projections extending into the through-bore. The locking collar may be rotatable between spindle lock and spindle release positions. A spindle may be translatably disposed in the through-bore of the locking collar. The spindle may include one or more projections extending radially outward from a rear outer surface of the spindle. In the spindle lock position of the locking collar, the projections of the spindle may be aligned with the projections of the locking collar to thereby prevent translation of the spindle in a forward direction. In the spindle release position of the locking collar, the projections of the spindle may not be aligned with the projections of the locking collar to thereby allow translation of the spindle in a forward direction.

Abstract: A method of increasing the rate of repletion of purine nucleotide pools in tissue deficient in the nucleotides, which comprises administering to a human or animal a therapeutically effect amount of 5-amino-4-imidazolecarboxamide riboside, 5-amino-4-imidazolecarboxamide, or a pharmaceutically acceptable salt thereof sufficient to increase the rate of the repletion is disclosed along with pharmaceutical compositions useful for carrying out the method of the invention.

Abstract: The interior side seam areas of tinplate can bodies exhibit improved resistance to corrosion by sulfur containing foods packaged therein when the side seam is soldered with a tin solder comprised of 0.1-0.5 percent by weight indium, 0.1-0.5 percent by weight bismuth, the remainder being tin.

Abstract: A method of increasing the rate of repletion of purine nucleotide pools in tissue deficient in the nucleotides, which comprises administering to a human or animal a therapeutically effective amount of 5-amino-4-imidazolecarboxamide riboside, 5-amino-4-imidazolecarboxamide, or a pharmaceutically acceptable salt thereof sufficient to increase the rate of the repletion is disclosed along with pharmaceutical compositions useful for carrying out the method of the invention.