 A pair of stainless double-action revolvers were also catering to defensive-minded owners. The larger of the two, weighing 36 ounces, minimum was the GP-100 that was a 1985 with a shrouded four- or six-inch barrel and a six-shot .357 Magnum cylinder, and a smaller frame made the SP-101, and that was introduced in 1989. It's 30% lighter than the GP-100.