JB4213 Smith & Wesson J Frame Model 42 Air Weight 2" Barrel Blue Used .38 Specia Jerry Miculek The disconnector is one of

The disconnector is one of the most critical safety components in the fire control system of Smith & Wesson semi-automatic pistols

Part number: 199300000

Not compatible with older pre-1992 models which use a different sight design

The white outline frames the front sight

JB4213 Smith & Wesson J Frame Model 42 Air Weight 2" Barrel Blue Used .38 Specia Jerry Miculek The disconnector is one ofJB4213 Smith & Wesson J Frame Model 42 Air Weight 2" Pinned Barrel Blue Used . 38 Special 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