Smith & Wesson K Frame Model K22 Thumb Piece & Nut Used Part K22-3 Model 500 Proven Design: Based on authentic

Proven Design: Based on authentic WWII-era specifications used by military armorers

Compatible with both the original M&P series and the M&P M2

The Model 637 features a visible hammer allowing both single-action and double-action operation

Model numbers began in 1957–58

50 caliber)

Smith & Wesson K Frame Model K22 Thumb Piece & Nut Used Part K22-3 Model 500 Proven Design: Based on authenticPart # K22 3 Smith & Wesson K Frame Model K22 Thumb Piece & Nut Used Part Please call or email with any questions! We sale Smith & Wesson pistol and revolver used, new & new old stock refurbished & new parts. 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 began in 1957 58. So if there is no model number then your revolver may be older than