.357 Magnum. 2.5" barrel length. SN: 6K88031. Brushed stainless steel finish overall with matte trigger and hammer and mounting black rubber Smith & Wesson monogram grips. Double action hand ejector six-shot revolver. Item mounts adjustable target rear and matted front red plastic insert sights. The standard MOD. 66 marking appears on the internal frame with both the Smith & Wesson trademark and four-line address to the right. Revolver features a pinned barrel and was not built with the internal safety lock.