Smith & Wesson J Frame Model 637 Trigger Assembly .312" Width Used .38 Special - J190637

Smith & Wesson J Frame Model 637 Trigger Assembly — .312" Width, Used

Part Lot # J190637 | Used | J Frame | .38 Special | .312" Trigger Width | DA/SA

Used OEM trigger assembly for the Smith & Wesson Model 637 Airweight J Frame revolver chambered in .38 Special. The Model 637 is the aluminum/stainless Airweight variant of the classic Chief's Special. This trigger assembly measures .312" in width, which is the wide serrated target-style trigger — preferred by many for a more positive grip on the trigger during double-action pull.

Trigger Width Reference

J Frame triggers are available in multiple widths. Always verify your current trigger width before ordering:

• .236" — Narrow, smooth face (carry/concealment style)
• .265" — Mid-width
• .312" — Wide, serrated target-style (this listing)

Compatibility

• Frame: J Frame
• Model: 637 Airweight (aluminum/stainless, DA/SA, .38 Special)
• Note: Most J Frame centerfire DA/SA triggers interchange across Models 36, 37, 60, 637, 638, 640 and related variants — verify your dash number and trigger width before ordering. Gunsmith installation recommended.

Specifications

• Trigger Width: .312"
• Caliber: .38 Special
• Action: DA/SA
• Condition: Used
• OEM: Factory Smith & Wesson part

Note: Installation by a qualified gunsmith is recommended.