I had a S&W model 63 kit gun, fun but difficult to shoot accurately. I have a 4" M17 that is very easy to shoot accurately, and with combat grips would be concealable, however I prefer the larger target grips that are usually found on M19's. I think the M18 is the same as my gun, and the M17 was made in 4" after the M18 was discontinued. I also had a 4" Diamondback, that I traded for a 6". Both very accurate but I wish I'd have kept the 4" and just bought the 6" without trading. Well, hindsight. Anyway the kit gun was fun, but like I said, was more difficult to shoot accurately, probably because of the light weight.