27187A S&W N Frame Model 27 Trigger Target .500" Wide .357 Magnum with pin Hammer assembly installation is a

Hammer assembly installation is a critical safety procedure

Frame Size: K Frame

Authentic S&W Quality: Genuine factory part

Genuine Smith & Wesson OEM part

(Does Not Fit J Frame

27187A S&W N Frame Model 27 Trigger Target .500" Wide .357 Magnum with pin Hammer assembly installation is a27187A Smith & Wesson Revolver N Frame Model 27 Target Trigger . 357 Magnum . 500" Wide Old Style Used Part 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 began in 1957 58. So if there is no model number then your revolver may be older than 1957 58. In this case we can possibly still find the part