If you’re looking to upgrade the trigger on your M&P 2.0, you’ve probably heard about the Apex 100-154. It’s one of the most popular drop-in triggers for these pistols, but before you buy, you need to know two things: will it fit your specific gun, and can you install it yourself without a trip to the gunsmith. We’ll walk through both so you can decide if this is the right move for your build.
What the Apex 100-154 Actually Is
The Apex 100-154 is a complete drop-in trigger system for Smith & Wesson M&P 2.0 pistols. It’s the curved version of their Forward Set Sear (FSS) trigger, which means it moves the trigger’s break point rearward in the trigger travel. The result is a shorter, cleaner pull with a tactile reset that’s easy to feel.
This isn’t just a trigger shoe swap—the kit includes the sear housing block, the sear, the trigger bar, and the trigger shoe itself. It’s designed to replace the entire factory trigger mechanism, not just the shoe. That’s why it’s important to check compatibility carefully before ordering.
Exact Compatibility: Which M&P 2.0 Models Work
The Apex 100-154 is specifically designed for the M&P 2.0 platform. It will not fit first-generation M&P pistols or any Shield models. Here’s the breakdown by frame size:
Full-Size M&P 2.0
This includes the 4.25-inch barrel models and the 5-inch Performance Center models. The Apex 100-154 drops right in with no modifications needed. We’ve installed these on dozens of full-size guns and they fit consistently.
Compact M&P 2.0
The 4-inch barrel compact models (like the M&P 2.0 Compact) are also fully compatible. The trigger mechanism is identical between the full-size and compact frames, so the 100-154 works without any fitting.
Subcompact M&P 2.0
Here’s where it gets tricky. The 3.6-inch barrel subcompact M&P 2.0 models use a different sear housing block geometry. The Apex 100-154 will physically install, but the trigger bar may not engage properly with the sear. We’ve seen mixed results—some customers report it works fine, others get a dead trigger or inconsistent reset. If you have a subcompact, we recommend calling us before ordering so we can check your specific serial number against Apex’s compatibility list.
What About the M&P 2.0 “CORE” or Optics-Ready Models?
These use the same trigger mechanism as their non-optics counterparts. If you have a full-size or compact CORE model, the 100-154 will fit. The optics cut doesn’t affect the trigger system at all.
Install Difficulty: 4 Out of 5
We rate this install at a 4 out of 5 for difficulty. That’s not because the parts are complicated—it’s because getting the sear housing block seated correctly takes patience and a steady hand. Here’s what you’re up against:
The trigger bar has to align with the sear engagement surface inside the housing block. If it’s off by even a hair, you’ll get a trigger that doesn’t reset or feels gritty. The sear housing block also has a spring-loaded plunger that needs to be compressed while you slide it into the frame. That’s the part that frustrates most first-time installers.
Plan for about 45 minutes to an hour if you’ve done trigger work before. If this is your first time, budget two hours and have a good set of punches and a small hammer ready.
What Gunsmith Skills You Actually Need
You don’t need to be a certified gunsmith to install the Apex 100-154, but you do need some mechanical comfort. Here’s the honest breakdown:
Required Tools
- 1/16-inch punch (for the trigger pin)
- 3/32-inch punch (for the sear housing block pin)
- Small hammer or mallet
- Needle-nose pliers (for the trigger bar spring)
- Safety glasses (that spring can fly)
Skills You Should Have
You need to be comfortable disassembling your pistol down to the frame. That means removing the slide, taking out the magazine release, and pulling the fire control unit out of the frame. If you’ve ever detail-stripped a Glock or a 1911, this is similar in complexity.
The tricky part is the sear housing block. It’s held in by a pin that goes through the frame and the block. You have to align the block perfectly while pushing the pin through. If the block shifts even a little, the pin won’t go through and you’ll have to start over.
We also recommend having a small file or sandpaper on hand. Sometimes the trigger shoe needs a tiny bit of material removed from the safety lever plunger hole to function smoothly. This isn’t common, but it happens on maybe 1 in 10 installs.
When to Call a Gunsmith
If you’ve never taken your pistol apart past field stripping, this isn’t the project to learn on. Find a local gunsmith or send us your frame and we’ll install it for you. The cost of a professional install is worth avoiding a broken sear or a trigger that doesn’t reset.
Warranty and Support
Apex Tactical backs the 100-154 with a limited lifetime warranty against manufacturing defects. If the trigger breaks or fails due to material or workmanship issues, they’ll replace it. That doesn’t cover damage from improper installation or modification, so take your time with the install.
If you buy from us at Eagle Firearms, we also offer a 30-day return policy on unused parts. Once you install it, it’s yours, but we’re happy to help troubleshoot over the phone or email if you run into issues.
For more details on the specific kit, check out the Curved Forward-Set Trigger Kit for M&P M2.0 product page. If you’re still deciding whether the M&P 2.0 is the right platform for your build, our M&P 2.0 platform hub has compatibility guides and build ideas for every model.
FAQ
Will the Apex 100-154 fit my M&P 2.0 Shield?
No. The Apex 100-154 is designed for full-size, compact, and subcompact M&P 2.0 frames only. Shield models use a completely different trigger mechanism and are not compatible.
Can I install the Apex 100-154 without removing the rear sight?
Yes, for most M&P 2.0 models. The sear housing block pin is accessible without removing the rear sight. However, on some Performance Center models with adjustable rear sights, you may need to remove the sight assembly to access the pin. Check your specific model before starting.
Does the Apex 100-154 reduce trigger pull weight?
Yes, typically by 1.5 to 2 pounds compared to the factory trigger. Expect a final pull weight around 4.5 to 5 pounds, depending on your specific pistol and any other modifications.
Will this trigger work with my M&P 2.0 that has a thumb safety?
Yes, the Apex 100-154 is compatible with M&P 2.0 models that have a thumb safety. The safety mechanism is separate from the trigger system and won’t be affected by the upgrade.
What if the trigger doesn’t reset after installation?
This is usually caused by the sear housing block not being fully seated. Remove the block, check that the trigger bar is properly aligned with the sear, and reinstall. If the problem persists, check that the trigger bar spring is correctly positioned. In rare cases, you may need to lightly polish the sear engagement surfaces.