Smith & Wesson K Frame Model 66-4 Trigger .300" Wide Smooth Stainless Steel Used Part 66190C

Smith & Wesson Model 66-4 Trigger — .300" Smooth Face, Stainless Steel

Restore your Combat Magnum's action with this genuine Smith & Wesson factory trigger pulled from a Model 66-2 revolver. The .300" wide smooth face in stainless steel delivers the clean, consistent pull that made the K Frame .357 Magnum a favorite of law enforcement and competitive shooters alike. Old-style pre-engineering-change profile — no MIM, no shortcuts.

Part Details

• Part Number: 66190C
• Frame: K Frame
• Width: .300" smooth face
• Material: Stainless Steel
• Style: Old Style (pre-engineering change)
• Condition: Used — factory original, mechanically sound

Compatible Models

• Smith & Wesson K Frame Model 66 (all dash variants: 66, 66-1, 66-2, 66-3, 66-4, 66-5) — .357 Magnum
• Smith & Wesson K Frame Model 65 — .357 Magnum
• Smith & Wesson K Frame Model 19 — .357 Magnum
• Other K Frame centerfire .357 Magnum revolvers using the same trigger profile

Note: This is a centerfire trigger — not compatible with rimfire K Frame models (17, 18, 48, 617, 648). Compatibility may vary by production year and engineering change. Verify part number against your specific revolver before installation.