L193 Smith & Wesson Used L Frame Model 581 Thumbpiece & Nut .357 Magnum k648n Ideal for co-witnessing iron sights

Ideal for co-witnessing iron sights with red dot optics

or for spare parts

The hand (also called the pawl) rotates the cylinder as you pull the trigger

Smith & Wesson Factory Part Number: 071040000

Gifts for gun rights advocates

L193 Smith & Wesson Used L Frame Model 581 Thumbpiece & Nut .357 Magnum k648n Ideal for co-witnessing iron sightsL193 Smith & Wesson Used L Frame Model 581 . 357 Magnum Blue Thumbpiece & Nut 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 you need with the serial # . If