The Model 29-2 with a 6 1/2-inch barrel was made from late 1962 until being replaced by the 6-inch version in 1979 when S&W standardized barrel lengths for this model at 4, 6, and 8 3/8 inches. In 1982, the Model 29-3 was introduced. Even though it was made for a much shorter period of time, many collectors and shooters favor the 6 1/2-inch barrel length over the 6-inch barrel length.
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