Your post mentions hammer and trigger and lighter pull, which leads me to believe you really want a hammer & sear kit to produce a lighter pull.
Best research tool is the Brownells Catalog, which can be ordered at www.brownells.com
They list a number of 'drop in' kits.
I would suggest that taking your SA to a reputable local gunsmith for a 4# trigger job is no more expensive and perhaps a better solution.
If you can't find a local pistolsmith you trust for that job, consider sending your SA to a reputable pistolsmith such Evolution Gun works www.egw-guns.com
The Brownells Catalog is pretty much the bible for researching grips and parts. The price of the catalog ($5 I think) is refundable in your first purchase.
Hope this helps.
Best research tool is the Brownells Catalog, which can be ordered at www.brownells.com
They list a number of 'drop in' kits.
I would suggest that taking your SA to a reputable local gunsmith for a 4# trigger job is no more expensive and perhaps a better solution.
If you can't find a local pistolsmith you trust for that job, consider sending your SA to a reputable pistolsmith such Evolution Gun works www.egw-guns.com
The Brownells Catalog is pretty much the bible for researching grips and parts. The price of the catalog ($5 I think) is refundable in your first purchase.
Hope this helps.