4" Security Six barrel weight ??'s

[gunzo]

About what year/SN prefix did the heavier contour start ? And after the appearance of the heavy, did the lighter weight go away?

Thanks

 

[RoninPA]

I have a GF-84H, s/n 154-101xx dated 1978 and I know that the standard (lighter) barrel did not go away after that as I have higher s/n's that have the standard barrel, both blue and stainless.

 

[gunzo]

Thanks Ron.
Hard for me to tell in a photo if one is a heavy or not. Might be tricky to try & find one on line.

 

[Cholo]

This is the thin barrel. Notice the massive up-swept rib with a small front sight attached to it.

This is the heavy barrel. Notice the much less up-swept rib with a larger front sight attached to it.

PS: In '78/'79 Ruger offered both.

 

[gunzo]

Great, thanks for the visual & the explanation, Cholo! Not to hard to spot one after seeing them like this.