58122B Smith & Wesson L Frame Model 581 Nickel 4" Non-Pinned Barrel Used .357 Mag 686-4 The serrated surface provides a

The serrated surface provides a positive

Ensures smooth action cycling and clearing

or assault weapon components

22 LR K-22 Masterpiece (rimfire) Model 18

Installation: Gunsmith fitting required

58122B Smith & Wesson L Frame Model 581 Nickel 4" Non-Pinned Barrel Used .357 Mag 686-4 The serrated surface provides aPart# 58122B Smith & Wesson L Frame Model 581 Nickel 4" Non Pinned Barrel . 357 Magnum 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 you need