Description
Factory replacement MAINSPRING for the Smith & Wesson® .400; Smith & Wesson® .4006; Smith & Wesson® .4043; Smith & Wesson® .4046; Smith & Wesson® .410; Smith & Wesson® .4506; Smith & Wesson® .4566; Smith & Wesson® .4586; Smith & Wesson® .5903; Smith & Wesson® .5906; Smith & Wesson® .5943; Smith & Wesson® .5946; Smith & Wesson® .910.
