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Part Number: MPC4
The trigger controls the firing sequence in both single-action and double-action modes
The side plate covers the action on the left side of the frame and is a critical structural and cosmetic component — a correct blue steel factory side plate is essential for a proper restoration of these classic hand ejector revolvers
Parts interchangeability with 3rd generation
22 LR ❌ Not compatible Note: This is a centerfire hammer
Smith & Wesson K Frame Model 12 Trigger .240" Wide Spur - Part# 12185B trigger stop Part Number: MPC4Smith & Wesson K Frame Model 12 Trigger . 240" Wide Spur Original Smith & Wesson factory trigger for the K Frame Model 12 . 38 Special revolver. This is an old style wide spur trigger measuring . 240" wide, a genuine used OEM part in good working condition. Part Specifications Part Number: 12185B Trigger Width: . 240" Wide Spur Style: Old Style Condition: Used Original Factory Part Frame Size: K Frame Caliber: . 38 Special Compatible Models This