Abstract: Firearms, firing systems, and methods may include a receiver, a double-action firing system, and a barrel assembly. The barrel assembly may include a plurality of barrels, and may be moveable relative to the receiver between a firing position and a loading position. The double-action firing system may be configured to fire one of the plurality of barrels with a first pull of a single trigger, and another of the plurality of barrels with a second pull of the single trigger.

Abstract: A small, lightweight multi-shot pistol, preferably includes a readily field removable receiver having two barrels in an over/under configuration. The butt of the pistol includes a storage chamber holding two spare cartridges. The single trigger is a double action trigger. The configuration of the pistol is such that two shots may be rapidly fired in a “double tap” manner, and the receiver can then be released using a thumb latch, whereby the receiver will be tilted upward and an auto-ejector will eject the spent cartridges. The spare cartridges are held together using a speed loader device which holds them so that they are properly aligned for speedy insertion into the breach of the tilted receiver.

Abstract: A small, lightweight multi-shot pistol, preferably includes a readily field removable receiver having two barrels in an over/under configuration. The butt of the pistol includes a storage chamber holding two spare cartridges. The single trigger is a double action trigger. The configuration of the pistol is such that two shots may be rapidly fired in a “double tap” manner, and the receiver can then be released using a thumb latch, whereby the receiver will be tilted upward and an auto-ejector will eject the spent cartridges. The spare cartridges are held together using a speed loader device which holds them so that they are properly aligned for speedy insertion into the breach of the tilted receiver.