 Smith Wesson Brands Inc. SWBI, -2.16 stock fell more than 6 in the extended session Tuesday after the firearms manufacturer missed Wall Street expectations for its fiscal second-quarter results, with sales dropping significantly year-on-year on weakened demand. Smith Wesson earned 9.6 million, or 21 cents a share, in the quarter, compared with 50.9 million, or 1.05 a share, in the year-ago period. 