The 5904’s were produced from 1989-1998. The early ones had the squared trigger guards. While my 1990 5904 has the squared trigger guard it thankfully has the Novak’s.
The 459’s production run was 1981-1988 with the first ones having the fix in field short/wide extractor, (like the 439’s.)
To me the D/A trigger pull of the 3rd Gen is smoother. Maybe because of the “half cock” feature, (let’s see if the Forum program censors that,) of the 2nd Gen.
Currently I like the curved grip on the 5904 but I’ve got straight too so there’s a choice.
You have options of the options, 459 and or 5904.
Jim
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