Mass Driver Hammer Kit for S&W K/L-Frame Revolvers
Originally designed to improve ignition of 22 Rimfire ammunition, the Apex Mass Driver Hammer is now for use in a variety of rimfire and centerfire Smith & Wesson revolvers. The design increases the mass behind the hammer's impact surface, allowing for a lighter double-action trigger pull than can be achieved with the factory's stock hammer. The Apex Mass Driver Hammer, with sear, stirrup, and spring, replaces Smith & Wesson factory MIM components to ensure consistent performance in both rimfire and centerfire revolvers. When properly installed, this hammer kit will:
- Improve ignition of 22 Rimfire as well as Centerfire ammunition
- Allow for reduced hammer fall weight and trigger pull weight
- Maintain the Single-Action feature
For Use In These Guns
Works in current production Smith & Wesson Models: 10, 17, 19, 48, 66, 617 (-4 and later), 648.
Also works in current production L-Frame Models: 586, 686, 986.
Does Not Fit These Guns
No recommended for use in the 44 Magnum Model 96.
Not for use in N-Frame model revolvers.
1 ea. Apex Mass Driver Hammer
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)
Products to Consider
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APEX Preorder Policy
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Preorders are charged when the order is placed and shipped as soon as the product is available. Our regular return policy applies, with the 60 day return policy starting from shipment date. See our Policies page for full details here