My dad and I both have Gen 2 Glock 23s- his is an earlier May 1995 mfg (BLG-prefix) with ".40SW" marked on the slide and mine is a later Gen 2 (April 1997/CFG-prefix) which simply has ".40"
So somewhere around 1995-96 they stopped marking them with the SW suffix. Similar to the .357 Glocks around 1998 (went from ".357 SIG" to ".357")
"Always believe in someone who is seeking the truth, never believe in someone who has found it."
Always looking for rare FN-FAL 50.00 rifles, German Weatherbys, and Stoner 63A parts.