The .40 S&W cartridge generates significantly more bolt thrust than 9mm, demanding a reinforced design. Our G22 sear features a tungsten carbide insert at the primary engagement surface — the hardest material commercially available for this application.
Key Features
- Tungsten carbide sear insert (92 HRA hardness)
- Reinforced 4340 chromoly steel body
- Designed for higher bolt velocity of .40 S&W
- Heat-treated to 58-60 HRC for body durability
- Compatible with Glock 22 and Glock 23
Specifications
| Material | 4340 Chromoly + Tungsten Carbide |
| Finish | Parkerized |
| Compatibility | Glock 22/23 Gen 3/4/5 |
| Weight | 0.18 oz |
| Rated For | .40 S&W / .357 SIG |
Expert Notes
Most auto sear failures we see come from using 9mm-rated sears on .40 S&W platforms. The increased bolt thrust accelerates wear exponentially. Our tungsten carbide insert solves this permanently — even after 20,000 rounds, the sear surface shows zero measurable wear.
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Frequently Asked Questions
Will a 9mm switch work in my G22?
We strongly advise against it. .40 S&W generates ~35% more bolt thrust. A 9mm-rated sear will wear prematurely and may fail unpredictably.
Does this work with .357 SIG barrels?
Yes. .357 SIG operates at similar pressures, and this sear is rated for both cartridges in G22/G23 frames.
What is the expected lifespan?
With tungsten carbide, rated for 20,000+ rounds before inspection. Standard steel sears typically need replacement at 5,000-8,000 rounds.
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