JB301E Smith & Wesson J Frame Pre Model 30 Thumbpiece & Screw Used .38 Special mim The thumbpiece (cylinder release latch)

The thumbpiece (cylinder release latch) is the lever you press to swing out the cylinder — a high-wear contact point that's commonly needed for restoration or repair

Verify your revolver uses the new style cylinder latch before ordering

Compatible with virtually all J Frame models from vintage to modern production

measurement equipment

Carry the legendary Smith & Wesson name on your wrist with this dependable tactical watch

JB301E Smith & Wesson J Frame Pre Model 30 Thumbpiece & Screw Used .38 Special mim The thumbpiece (cylinder release latch)JB301E Smith & Wesson J Frame Pre Model 30 Trigger Used . 38 Special 5 Screw 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