Smith & Wesson K Frame Model 10 Thumb Piece & Nut Blue Steel Old Style Used Part 10179D Model 3906 This is an authentic Smith

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Smith & Wesson K Frame Model 10 Thumb Piece & Nut Blue Steel Old Style Used Part 10179D Model 3906 This is an authentic SmithSmith & Wesson K Frame Model 10 Thumb Piece & Nut Blue Steel Old Style Used Part #10179D Factory OEM thumb piece and nut assembly for Smith & Wesson K Frame Model 10 revolvers, old style design in blue steel finish. The thumb piece is the external lever you press to release the cylinder latch, allowing the cylinder to swing out for loading, unloading, and cleaning. The nut secures the thumb piece to the cylinder latch mechanism inside the frame.