OEM Part Number: 66107C
Condition: Used, fully functional
Fitment: Model 66-1 (.357 Magnum)
Frame Type: K Frame (Centerfire)
Spur Width: .365" (standard)
Material: Stainless Steel
Design: Old-style configuration
This authentic Smith & Wesson stainless steel hammer is a direct-fit replacement component for Model 66-1 Combat Magnum revolvers. The .365" spur width provides the standard profile for reliable thumb cocking and comfortable double-action shooting. This old-style hammer features the classic S&W design with integrated firing pin.
Key Features:
This centerfire hammer is designed for Smith & Wesson K Frame Model 66-1 revolvers chambered in .357 Magnum. It is compatible with other centerfire K Frame models including Models 10, 11, 12, 13, 14, 15, 16, 19, 64, 65, 66, and 67.
Important: This hammer is NOT compatible with rimfire K Frame models (17, 18, 48, 617, 648, K22) due to different firing pin configurations. Rimfire and centerfire hammers are not interchangeable.
Factory Smith & Wesson hammers are precision-machined and heat-treated to exact specifications for proper hardness, durability, and reliable ignition. Using genuine parts ensures correct geometry for proper trigger engagement, sear contact, and firing pin alignment – critical for safety and function.
Note: Professional installation by a qualified gunsmith is strongly recommended. Proper fitting, timing verification, and function testing are essential when replacing hammer components.