A double-barreled firearm having a slide having a slide body, a first barrel, a second barrel in parallel with first barrel, a firing chamber having a first firing chamber and having a second firing chamber and a mechanism for firing only one chamber thereof. The mechanism has a selector switch having a selector switch channel, two feed bar assemblies, two extractor assemblies and a retainer. The selector rod has a proximal end, a distal end and a feed bar notch. The distal end is in rotational communication with the firing chamber. The proximal end engages with the selector switch channel such that when the selector switch is pushed from side to side, the proximal end travels along the selector switch channel causing selector rod to rotate. The two feed bar assemblies are in communication with the feed bar notch of the selector rod. Each of the two feed bar assemblies have a feed bar face. The two extractor assemblies are in communication with the selector rod. Each of the extractor assemblies has an extractor claw and a claw pushrod. A linkage is in communication with each of the claw push rods. The retainer is in communication with the distal end of the selector rod and with the firing chamber.