Double action only revolver with cylinder open. Ammunition goes in the holes (chambers) in the cylinder Published on January 20, 2014 in Revolver vs. Semi-AutomaticFull resolution (3072 × 2304) ← Previous Next → Double action only revolver with cylinder open. Ammunition goes in the holes (chambers) in the cylinder Double action only revolver with cylinder open. Ammunition goes in the holes (chambers) in the cylinder