Thunder Hammer for Smith & Wesson® SW22 Victory®


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0.30 LBS
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TANDEMKROSS "Thunder" Hammer for SW22® Victory™ Installation Instructions


At a glance:

  • Lighter weight for improved performance
  • Reduces trigger pull weight and lock time
  • Precision machined from hardened S7 tool steel for long-lasting durability


The SW22 Victory® features a good trigger out of the box, but even a good gun can be made great! Upgrading your SW22 Victory®  hammer is a simple way to improve your SW22 Victory® trigger pull weight and transform your pistol into a shooting sports race gun.

The new TANDEMKROSS “Thunder” Hammer for SW22 Victory® is a drop-in replacement hammer that significantly reduces trigger pull weight. 

The “Thunder” hammer is precision-machined from hardened S7 tool steel for improved performance. The lighter weight SW22 Victory® hammer reduces lock time and changes the angle of engagement between the hammer and sear, producing a crisper trigger break and lowering the trigger pull weight - ideal for Rimfire Challenge, Steel Challenge and other speed shooting sports! 

Paired with a TANDEMKROSS "Victory" Trigger for SW22 Victory® , the "Thunder" Hammer can reduce trigger pull weight to below 2lbs!*

The "Thunder" Hammer features diamond-like coating for impact and heat resistance and also features an upgraded, dog-bone style strut pin. While the hammer can come apart into three pieces, the strut pin is designed to stay in place when under pressure, ensuring it does not loosen inside the gun.

For a full review of the impact the “Thunder” Hammer has on trigger pull weight, please watch the video above, or view it on our YouTube channel.

*Individual trigger pull weight results may vary.

Don't forget! All TANDEMKROSS products are Made in the U.S.A. and come with a no-hassle lifetime guarantee!

68 Reviews

  • 5
    Thunder Hammer

    Posted by Russ on 28th Jul 2023

    This is a great product and Tandemkross is exceptional

  • 5
    Thunder hammer for SW 22 victory

    Posted by Keith on 14th Nov 2022

    Was easy to install. I would definitely purchase again. It works just as promised.

  • 5
    Trigger pull under 2 lbs

    Posted by John on 10th May 2022

    Installed this along with victory trigger. Factory trigger pull was high 3 lbs now under 2 lbs. Very happy.

  • 5
    Thunder Hammer

    Posted by Craig on 26th Apr 2022

    This part is a great addition to the performance of my SW22

  • 5
    Thunder Hammer

    Posted by Alexander on 15th Jan 2022

    I replaced the rebound springs to complete the firing pin replacement I did in June. I was experiencing light strikes a lot. Replacing the rebound spring as well as the factory hammer, extractor spring and plunger seemed to have solves the problem.

  • 5
    Thunder Hammer

    Posted by Bill Tshudy on 12th Sep 2021

    I thought the trigger was good, then I installed the Thunder Hammer, WOW this is an INCREDIBLE gun now!!!

  • 5
    Thunder Hammer

    Posted by I. Smith Noland, Jr on 6th Jul 2021

    I was upgrading a used SW22 PC Victory that I had purchased and had already experienced a failure to eject and unintentional safety resets. I was ordering the Cornerstone Thumb Ledge (great product) and the Eagle Talon Extractor (another great product) and included the Thunder Hammer in my order. I was not concerned with trigger pull weight but simply wanted to refresh the entire unit while I was at it. Bill's instructional videos are excellent on all of the installs. I also discovered that a handgrip screw was stripped when I went to remove the Hive Grip, so also ordered the titanium torx head grip screws. All great products. Thanks Tandemkross.

  • 5
    Thunder Hammer Upgrade

    Posted by Mark on 14th Apr 2021

    I installed the Thunder Hammer and trigger kits together and it took my Victory 22 to the next level in control and accuracy. The Thunder Hammer is a quality, precision built component. If you are a competitive shooter, or just want to treat yourself to a high quality trigger and hammer combination this is the way to go. The Tandemkross components and video allow for self installation, so while $65 might seem like a lot of money you will save more on not having gunsmith charges. I put the Thunder Hammer in two Victory 22's and I am 110% satisfied. I have spoken with the people at Tandemkross about the Thunder Hammer and other items I have ordered and I highly recommend them for the quality of their parts and for their excellent customer service.

  • 5
    Thunder Hammer for S&W 22

    Posted by Charlie on 5th Apr 2021

    Works as it’s suppose to. A great addition to my pistol. Reduced trigger pull and smoothness.