Smith & Wesson K Frame Trigger with Hand Old Style .310" MIM Stainless Used Part 66107F
$6.99
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Smith & Wesson K Frame Trigger with Hand Old Style .310" MIM Stainless Used Part 66107F
$6.99
Smith & Wesson K Frame Trigger with Hand — Old Style | .310" MIM Stainless | Used | Part #66107F
Factory OEM trigger and hand assembly for Smith & Wesson K Frame revolvers. Old style design featuring .310" trigger width, MIM (Metal Injection Molded) construction, and stainless steel finish. The integrated hand rotates the cylinder into alignment with each trigger pull for reliable double-action operation. Genuine S&W factory part in used condition.
This listing is for the trigger and hand assembly only. Condition: Used, factory original.
Specifications
- Part Number: 66107F
- Frame: K Frame
- Trigger Width: .310"
- Construction: MIM (Metal Injection Molded)
- Finish: Stainless Steel
- Design: Old Style
- Includes: Trigger + Integrated Hand
- Condition: Used / Factory Original OEM
Model Compatibility Chart
| Model | Caliber | Notes |
|---|---|---|
| Model 10 | .38 Special | All variants |
| Model 11 | .38 Special | Military & Police |
| Model 12 | .38 Special | Airweight |
| Model 13 | .357 Magnum | All variants |
| Model 14 | .38 Special | K-38 Masterpiece |
| Model 15 | .38 Special | Combat Masterpiece |
| Model 16 | .32 Long / .32 H&R | K-32 Masterpiece |
| Model 17 | .22 LR | K-22 Masterpiece (rimfire) |
| Model 18 | .22 LR | Combat Masterpiece (rimfire) |
| Model 19 | .357 Magnum | Combat Magnum |
| Model 48 | .22 Magnum | K-22 MRF (rimfire) |
| Model 53 | .22 Jet | All variants |
| Model 64 | .38 Special | Stainless |
| Model 65 | .357 Magnum | Stainless |
| Model 66 | .357 Magnum | Combat Magnum Stainless |
| Model 67 | .38 Special | Stainless |
| Model 617 | .22 LR | Stainless (rimfire) |
| Model 648 | .22 Magnum | Stainless (rimfire) |
Unlike hammers, triggers and hands are interchangeable across all K Frame models regardless of caliber (centerfire and rimfire). Verify trigger width compatibility with your specific model before ordering.
Function
The trigger controls the firing sequence in both single-action and double-action operation. The integrated hand engages the cylinder ratchet to rotate the cylinder one chamber per trigger pull, ensuring proper chamber-to-barrel alignment. Worn triggers cause inconsistent double-action pull weight and poor cylinder timing.
Installation Note
Gunsmith installation recommended. Trigger and hand fitting requires timing verification to ensure proper cylinder rotation and lockup. Incorrect installation can cause timing failures or cylinder binding.