This link was originally posted by Fastbolt:

http://www.smith-wesson.com/wcsstore...ist_Retail.pdf

It shows parts listing for the S&W semi-autos. The 457 only shows a dual spring setup. It is likely that if you have one loose spring that it was put on by someone who ordered a spring from Wolff springs. That is the only spring they have for the compacts. The dual spring setup has to come from S&W.

Gunsrfun1, please let us know what S&W says. BTW, I own a 457S with the dual spring setup, but it is a more recently manufactured gun.

Bill