way around, fixed cylinder revolvers are inherently strong designs. Accordingly, many modern large caliber hunting revolvers tend to be based on the fixed cylinder design. Fixed cylinder revolvers can fire the strongest and most powerful cartridges, but at the price of being the slowest to load or unload, as they cannot use speedloaders or moon clips for loading, as only one chamber is exposed at a time to the loading gate. Top-break cylinder In a top-break revolver, the frame is hinged at the bottom front of the cylinder. Releasing the lock and pushing the barrel down exposes the rear face of the cylinder. In most top-break revolvers, this act also operates an extractor that pushes the cartridges in the chambers back far enough that they will fall free, or can be removed easily. Fresh rounds are then inserted into the cylinder. The barrel and cylinder are then rotated back and locked in place, and the revolver is ready to fire. Top-break revolvers are able to be loaded more rapidly than fixed frame revolvers, especially with the aid of a speedloader or moon clip. However, this design is much weaker and cannot handle high pressure rounds. While this design is mostly obsolete today, supplanted by the stronger yet equally convenient swing-out cylinder design, manufacturers have begun making reproductions of late 19th century designs for use in cowboy action shooting. The first top-break revolver was patented in France and Britain at the end of December in 1858 by Devisme. The most commonly found top-break revolvers were manufactured by Smith & Wesson, Webley & Scott, Iver Johnson, Harrington & Richardson, Manhattan Fire Arms, Meriden Arms and Forehand & Wadsworth. Tip-up cylinder The tip-up revolver was the first design to be used with metallic cartridges in the Smith & Wesson Model 1, on which the barrel pivoted upwards, hinged on the forward end of the topstrap. On the S&W tip-up revolvers, the barrel release catch is located on both sides of the frame in front of the trigger. Smith & Wesson discontinued it in the third series of the Smith & Wesson Model 1 1/2 but it was fairly widely used in Europe in the 19th century, after a patent by Spirlet in 1870, which also included an ejector star. Swing-out cylinder The most modern method of loading and unloading a revolver is by means of the swing-out cylinder. The first swing-out cylinder revolver