if it is a staggerfeed it is not worth it to update it from a $$$ point of view.

if it is a staggerfeed you are probably further ahead buying a package rifle from a chain store that is basically a stevens w/ a savage logo, but some do have detach mags. the whole rifle runs in the $350 range.

if your a centerfeed already you can probably find a stock cheap(or upgrade to a vlp or something) that is set up for the bottom metal and SSS will sell you a mag and metal for less than $100 i think.