Jeremy,
Don't confuse types of gun with model names. For example, a military & police is a model name but the type of gun is a hand ejector. The hand ejectors are those revolvers where the cylinder swings out of the frame to the side. The very first version of these did not have a thumb latch and the cylinder was released by pulling on the ejector rod. Also had the cylinder stop on top of the frame as opposed to the current style where it is on the bottom.
The regulation police is also a model name and it too is a hand ejector.