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686 - SS version introduced in 1980. Model 686 Powerport introduced in 1995
686 Plus: - 7 round stainless, 1996-current, round ***.
686-1 - 1986 - Radius stud package, floating hand.
686-M 1987 Product warning by S&W, M overstamp to indicate factory mod
for 686 and 686-1.
686-2 1987 Change hammer nose and associated parts - fixed a problem
with the firing pin; earlier models were recalled and stamped with an
M inside the crane above the modell number. Problem was cylinder
binding when used with some .357 magnum ammo. The primers in the
40,000 psi/cup 357 magnum round backing out and/or extruding into the
firing pin bushing; mod is to replace the bushing.
686-3 1988 New yoke retention system
1990 2 1/2" barrel intro. Some of these came out in blackened
(phosphate?) stainless (Midnight Black) in 1990.
686-4 1994 Drill and tap, synthetic grips, change rear site and extractor.
1995 Intro power port barrel
1995 Intro 7-shot (686 Plus)
1996 Delete square ***
1997 Change to MIM thumb piece
686-5 1998 Change design to eliminate cylinder stop stud. Change to
MIM hammer with floating firing pin (hammer mount changed to frame
mount), change to MIM trigger, change internal lockworks
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