4 Smith & Wesson K Frame Pre Model M&P Thumb Piece .32-20 ctg. sw9v Installation requires partial disassembly of

Installation requires partial disassembly of your S&W J-Frame revolver to access the mainspring and rebound spring

Smith & Wesson J Frame

Stainless steel finish may show minor wear typical of service revolvers

Used OEM Part - MBU42

4 Smith & Wesson K Frame Pre Model M&P Thumb Piece .32-20 ctg. sw9v Installation requires partial disassembly of4 Smith & Wesson K Frame Pre Model M&P Used Thumb Piece & Nut . 32 20 ctg. Serial # B125533 We sale used, new & new old stock Smith & Wesson double action revolver parts. Shoot us an email or give us a call for all your S&W Gun needs! USA Guns And Gear Please call or email with any questions! How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers