The Savage Model 101 is a one shot American "revolver".
In the late 1950s and early 1960s, many companies were getting into the six gun game with the rise of the western film, featuring the famous Colt Single Action Army. Companies like Ruger produced their own revolvers, and Savage was no exception, producing this cheap $20 revolver. However, there were limiting factors such as it only holding one shot and inefficiency, and it was discontinued after eight years of production.
The Model 101 looks like a Colt Single Action Army by design, but one can notice some differences upon closer inspection. The cylinder is fake and is actually the loading mechanism for the gun; the "cylinder" actually has fake brass bullets bored into them. Pushing the "cylinder" out from the left exposes the loading mechanism. The gun has an extractor that mirrors the one on the Single Action Army. Once the "cylinder" is pressed back in, the hammer can be cocked and the gun can fire. Once fired, extract the cartridge by pushing on the extractor.