Smith & Wesson J Frame Model 37 Airweight Hammer Block Old Style .38 Special Used SW99 Series This precision-machined barrel features

This precision-machined barrel features

31 K-Frame

tritium powered

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Part #: 394000000

Smith & Wesson J Frame Model 37 Airweight Hammer Block Old Style .38 Special Used SW99 Series This precision-machined barrel featuresSmith & Wesson J Frame Model 37 Airweight Hammer Block Old Style . 38 Special Used (Part# J3710A) This listing is for one used Smith & Wesson J Frame Model 37 Airweight hammer block in the old style configuration. This is an OEM factory part in used condition, removed from a functioning firearm. The hammer block is a passive safety component that prevents the firing pin from contacting the primer unless the trigger is fully depressed. Note: This is