Looks like the -5 (1997) is when Smith went to the floating firing pin with flat hammer also MIM trigger.
The -6 (2002) was the Internal lock system.
This is according to the SCSW.
A year or so ago I converted 2 S&W model 681 to 7 shot revolvers, the 681 is the same gun as the 686 except it has fixed sights. The first one was fairly easy, just swapping a few parts with very little hand fitting. The second one was more involved--endshake, barrel to cylinder had to be set...
A Smith & Wesson parts diagram shows that the K,L and N frame cylinder stops all have the same part numbers so they should be the same.
The K and L yoke screws have the same parts number but the N frame part number is different. The screw heads come in round and flat (may be others) blued...
Will take the following. PM on the way
2 full and 1 partial box of Remington .444 Marlin cartridges. The 2 full boxes are 265 grain soft point and the partial box holds 16 rounds of 240 grain soft points with 4 empty cases. All factory rounds, in excellent condition, I bought a couple of...