
Smith & Wesson Revolver Competition Reduced Spring Kit for S&W K-L-N Revolver's
TK Custom Competition Reduced Spring Kit – S&W K/L/N Frame Revolvers
Built for performance-driven revolver shooters, the TK Custom Competition Reduced Spring Kit is the upgrade that transforms your Smith & Wesson K, L, or N Frame revolver into a smoother, faster, more consistent machine. Whether you compete at a high level or simply want the best feel out of your action, this kit delivers pro-grade results—without the need for a gunsmith.
With this kit, you can expect a significant reduction in double-action trigger pull—from a stock 13+ lbs to a crisp, competition-ready 8.5–9 lbs. And if you’re running Federal primers? You can reliably tune your trigger down to a buttery 6 lbs with complete confidence.
Every component in this kit is tested and trusted by National Championship-level shooters and engineered to maintain reliable ignition across a wide range of ammo. From club matches to carry setups, this is the spring kit that makes your revolver feel like it should have from the factory.
Key Features
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Availability: Ships within 4 business days
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COMPETITION-READY TRIGGER PULL – Lowers double-action trigger weight to 8.5–9 lbs with most ammo, and down to 6 lbs with Federal primers.
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IMPROVED IGNITION RELIABILITY – Extended firing pin and reduced-power spring help eliminate light strikes and ensure consistent primer engagement.
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COMPLETE TRIGGER TUNING KIT – Includes everything needed to tune your S&W K/L/N Frame revolver: main spring, 11 & 12 lb rebound springs, extended firing pin + spring, strain screw, Allen wrench, and blue Loctite.
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DROP-IN INSTALLATION – Designed for easy home installation. No fitting, no gunsmithing, no special tools.
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BUILT FOR PERFORMANCE – The same kit trusted by USPSA revolver shooters and law enforcement trainers nationwide.
Why Shooters Choose TK Custom
We’re not here to make generic upgrades—we build revolver components with purpose. Every spring in this kit is hand-picked for performance and tested for real-world reliability. Our kits are used by the best in competition because they work. They’re also easy enough to install at your workbench with just a few tools—and no guesswork.
If you’re ready to feel what a revolver trigger *should* feel like, this is the kit that makes it happen.
Spec Ops Profile
- Part Name: Competition Reduced Spring Kit
- Platform: Smith & Wesson K, L, N Frame Centerfire Revolvers
- Trigger Pull Reduction: Factory 13+ lbs → 8.5–9 lbs standard / 6 lbs with Federal primers
- Included: Main Spring, 11 lb & 12 lb Rebound Springs, Extended Firing Pin, Firing Pin Spring, Strain Screw, Allen Wrench, Blue Loctite
- Install Type: Drop-In / No Gunsmithing Required
- Made In: USA
*Quality you can see. Excellence you can feel.*
Free Shipping on orders over $250.00 in the USA only!
Smaller orders less than $250.00 are $9.95 for shipping.
No Free Return Shipping with Labor
No International Shipping, except to Canada.
$35.00
Canada - Priority Mail / NO Tracking Out side of USA

FREQUENTLY ASKED QUESTIONS
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Federal or Remington & others makes works the best with the .025 thick Full Moonclips, which fit all the .38/357 standard moonclip. They allow the cartridges to have some movement or wiggle so that they will fall right into the chambers once properly aligned. Winchester brass does not work at all as the groove width is too tight/small.
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Use this text block to discuss some commonly asked questions like shipping and returns, sizing, warranties, or product and company details.
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There is no SAAMI specifications for the extractor groove and each manufacturer makes them as they want. The following list gives you a great example. This is why the diameter size of the brass is critical to proper loading, unloading and fitment. Cartridge diameter too big and moonclip too small causes the moonclip to bend. The cartridge should rotate within their respective place and wobble slightly when all cartridges are loaded.
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If you are unsure about how to use moon clips for your revolver, or wondering which moon clip to use, call us. See the Contact menu tab.

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