Description
The factory trigger on the M&P Shield 45 is decent out of the box, but most folks who carry one know it can feel a touch heavy and stiff. That's exactly what Apex built this Duty/Carry Kit to fix. Using a precisely machined sear and a matched spring set, the kit knocks roughly two pounds off your pull weight while keeping things smooth, consistent, and squarely in the range you'd want for an everyday carry gun.
What the Apex Shield 45 Kit Changes
This isn't a lightened, race-gun-only setup. The whole point is a reliable carry trigger that feels a whole lot better. You get a shorter, more detectable reset, reduced over-travel, and a cleaner break, which translates to faster, more confident follow-up shots. Plenty of Shield owners running this kit have put thousands of rounds through their pistols without reliability hiccups, and Apex backs the parts if a spring ever needs attention.
Fitment for the Shield 45 and Shield M2.0 in .45
Read this part carefully before you buy. This kit is made specifically for the Smith & Wesson M&P Shield and Shield M2.0 chambered in .45 caliber. It will not work in the 9mm or .40 caliber Shield, the Shield EZ, or pistols chambered in 30 Super Carry. If you've got a 9mm or .40 Shield, Apex makes a different kit for those, so grab the right one for your gun.
Installing the Apex Duty/Carry Kit
This is a drop-in kit, and Apex includes the little extras that make the job manageable, including a slave pin to help seat the trigger return spring and a Talon Tactical tool for the striker block work. With the right punches and an hour of patience, a mechanically inclined owner can knock it out at home. If wrenching on your carry gun isn't your thing, any competent gunsmith can install it quickly. Either way, once it's in, you'll feel the difference the first time you dry fire it.
Key Specifications
- Manufacturer: Apex Tactical Specialties Inc.
- Manufacturer Part Number: 100-166
- UPC: 854263007111
- Model: Duty/Carry Kit
- Fits: S&W M&P Shield & Shield M2.0 in .45 caliber
- Not Compatible: Shield 9mm/.40, Shield EZ, 30 Super Carry
- Trigger Pull Reduction: Approximately 2 lbs lighter than factory
- Finish/Color: Black
- Installation Type: Drop-in
- Category: Handgun Trigger Parts
What’s Included
- 1 Fully machined .45 sear
- 1 Striker block spring
- 1 Talon Tactical tool
- 1 Shield carry spring set
- 1 Sear spring (1/8")
- 1 Slave pin (aids trigger return spring installation)
Frequently Asked Questions
Will this Apex Duty/Carry Kit fit my 9mm Shield?
No. This kit (part 100-166) is built specifically for the M&P Shield and Shield M2.0 in .45 caliber. Apex makes a separate kit for the 9mm and .40 caliber Shield pistols, so you'll want that one instead if your Shield isn't a .45. It's also not for the Shield EZ or pistols chambered in 30 Super Carry.
How much lighter will my trigger feel after installing the Shield 45 kit?
Apex spec's a reduction of about two pounds off the factory pull, which usually lands you in the 5 to 5.5 pound range depending on your pistol's tolerances. Beyond the weight, most owners notice the shorter reset and reduced over-travel just as much as the lighter pull. It's a smoother, more consistent trigger overall, not just a lighter one.
Is this a drop-in kit or do I need a gunsmith?
It's designed as a drop-in kit, and Apex includes a slave pin and the Talon Tactical tool to help with the trickier steps like the trigger return spring and striker block. A mechanically inclined owner with the proper punches can typically install it in about an hour. If you'd rather not disassemble your carry gun, any competent gunsmith can handle it fast.
Is the Apex trigger reliable enough for a carry gun?
Yes, that's the whole design intent behind the Duty/Carry line. Apex tuned these parts to keep pull weight in a range that's appropriate for carry rather than stripping it down like a competition setup. Owners routinely run several thousand rounds through Shields with this kit installed without issues, and Apex stands behind the parts.





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