Smith & Wesson ( SWHC) was among the biggest small-cap losers in a down session Tuesday, plummeting some 40% on disappointing preliminary results. The Springfield, Mass., gunmaker cut its year-over-year revenue growth prediction by at least 20 percentage points to between 36% and 40%, meaning total sales of $69 million to $71 million. Analysts polled by Thomson Financial are looking for $82.4 million. Income should range between 5 cents and 7 cents a share, at least a nickel below the mean. Shares were falling $7.92 to $12.17. Laser-eye surgery outfit LCA-Vision ( LCAV) tumbled 32.7% after predicting that fourth-quarter income will be "significantly below" last year's 27 cents a share, which effectively pushes full-year guidance well below the prior forecast of $1.90 to $2 a share. Cincinnati-based LCA cited an "uncertain business environment." Third-quarter earnings were in line, but shares traded down $9.19 to $18.92, which helped give a black eye to both the Russell 2000 -- which also tracks Smith & Wesson -- and the S&P SmallCap 600. The sector trackers were off 0.3% and 0.2%, respectively. Wellman ( WLM) stock booked spectacular losses in heavy trading after the maker of resins and polyester staple fibers said it hired Lazard Freres, "an investment bank with extensive experience in chemical M&A transactions," in order to explore strategic alternatives.