Smith & Wesson K Frame Model 12-2 Airweight Thumb Piece Blue Steel .38 Special Used Part# 12177A k586-3u About the SW9VE Sigma:

About the SW9VE Sigma:

38 Special (New Old Stock)

Thumb Piece & Nut (Flat Latch)

357 Magnum) — N Frame (verify fit before ordering)

Smith & Wesson K Frame Model 12-2 Airweight Thumb Piece Blue Steel .38 Special Used Part# 12177A k586-3u About the SW9VE Sigma:This is a used OEM Smith & Wesson thumb piece (cylinder release latch) in blue steel finish, removed from a K Frame Model 12 2 Airweight revolver chambered in . 38 Special. The thumb piece is the lever on the left side of the frame used to swing the cylinder open. This old style thumb piece is compatible with the Model 12 2 and may fit other K Frame models of the same era verify your dash number and production date before ordering. Part Number: 12177A