Hammer Kit for Smith & Wesson® Revolvers - K/L Frame

Evolution IV Revolver Hammer Kit

Mass Driver Revolver Hammer Kit

Availability: Out of stock


The Apex Mass Driver Hammer is designed to lower both the hammer fall weight and the trigger pull weight for competition and recreational use. The hammer replaces MIM components found in Smith & Wesson Model 617 revolvers (–4 and later). When properly installed, this hammer kit will:


-Allows for reduced hammer fall weight and trigger pull weight

-New design allows for both DA and SA function




For Use In These Guns

For use in current production Smith & Wesson Model 617-4 (L-Frame) .22 rimfire revolvers only.

Does Not Fit These Guns

Not for use in centerfire model revolvers.

What's Included

1 ea. Apex Mass Driver Hammer (L-Frame)

1 ea. Apex Fully Machined Revolver Sear (pre-installed)

1 ea. Apex Sear Spring (pre-installed)

1 ea. Stirrup and Pins (pre-installed)

1 ea. Duty/Carry Rebound Slide Spring (Green)

1 ea. Competition Rebound Slide Spring (Silver)

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