The Nagant 1895 was a unique revolver used by the USSR during World War II. It featured a gas seal system which moved the cylinder forward when the hammer was cocked. Closing the gap between the barrel and cylinder sealed off the gasses from escaping, raising the muzzle velocity and allowing the revolver to be suppressed. The downside to the Nagant was its extremely slow reloads. Each round must be unloaded and reloaded one by one. This type of revolver would soon be replaced by newer designs which were much faster to reload, including the American style of revolvers with swing out cylinders and break top models which eject all shells casings at once.