Not quite! The recent M18-7 "Classic" had a Patridge front sight. It also had an unshrouded ejector rod, creating a combination that AFAIK otherwise does not exist in standard-production M17 and M18 history. (I say "standard-production" because unusual exceptions almost always exist when one discusses old S&W's. )If you saw a 4" with anything but a ramp front sight, it was a 17.
You're essentially correct about the older M18, but the M17 story is a bit more complicated.Model 18 is strictly 4" with a Baughman quick draw ramp from sight. The 17 has been made in 4", 6" and 8 3/8" lengths with a Patridge style front sight. Later models had full lug barrels. Those are the only differences.
While this is true, I feel obligated to point out a minor mandatory disclaimer or explanatory note...You will hear the 15 and 18 referred to as the "combat masterpiece" and the 14, 16 and 17 as the "target masterpiece."
How about my model 19?? How is that different, it is a .357 with a 4" barrel.
When was that model made?
In any case, the K-22 and M17 and M18 are just about the sweetest-shooting rimfire revolvers around. They are excellent guns for new shooters.
Dave T said:A distinction that I don't think has been mentioned is that the M-18 has a tapered barrel while the M-17, in any barrel length, has an un-tapered barrel.
AFAIK newfrontier45 is correct. FWIW several different barrel profiles exist for the "Target" Masterpiece series, particularly for the late 40's and early 50's models.newfrontier45 said:The earlier, unshrouded 17's have a tapered barrel too, regardless of length.