Description
CMC pretty much invented the drop-in AR trigger, and this two-stage curved unit is the payoff of decades spent refining what goes inside the housing. It's a complete fire control group sealed in a 410 stainless steel shell, factory-tuned to a 1 lb take-up first stage and a crisp 3 lb second-stage break. The curved bow keeps your finger indexing in the same spot pull after pull, which is a bigger deal than most folks expect once they get behind it. If you've been running a gritty mil-spec trigger, this is the kind of change you feel on the very first shot.
What Sets the CMC Two-Stage Curved Trigger Apart
The two-stage design gives you a defined wall to stage against before the break, so you know exactly where the shot is going to go. That predictability makes it a strong fit for precision builds, designated marksman rifles, or any AR where a repeatable break matters more than a fast hammer. Inside, CMC uses hardened hammer, sear, and disconnector surfaces along with full-strength music wire springs, which keeps lock time short and cycling reliable with both commercial and surplus ammo. The reset is short and positive, so getting back on target for follow-up shots comes naturally.
Dropping the CMC Curved Trigger Into Your Build
Installation is about as painless as AR work gets. The whole assembly drops into the lower as one piece and locks down with the supplied oversized pins and set screws, no C-clips, no wrestling a hammer under spring tension. Most people have it swapped in and function-checked in under twenty minutes with basic tools. When you snug the pinset screws, keep torque at or under 12 in-lb and you're good to go.
Fitment Notes for the CMC 1-3 lb Trigger
This model is built for standard small pin receivers using the .154-inch trigger and hammer pin holes, which covers the vast majority of AR-15 and AR-10 platforms out there. It does not fit Colt AR-15 rifles equipped with a sear block. If you're unsure of your pin size, press a pin partway out and measure it: .154 is small, .172 is large. Proudly built in Texas by a family-owned shop that stands behind their gear.
Key Specifications
- Manufacturer: CMC Triggers
- Manufacturer Part Number: 91502
- UPC: 850544004015
- Model: Drop-In
- Trigger Type: Two-Stage
- Trigger Style: Curved
- Pull Weight: 1-3 lb (1 lb first stage / 3 lb break)
- Pin Size: Small Pin (.154 in)
- Housing Material: 410 Stainless Steel
- Spring Type: Full-Strength Music Wire
- Fitment: Mil-Spec AR-15 / AR-10 / LR-308
- Adjustable: No, factory preset
- Color: Black
- Country of Origin: USA (Texas)
- Units per Box: 1
What’s Included
- CMC two-stage curved drop-in trigger assembly (1 unit)
- Oversized installation pins
- Pinset set screws
Frequently Asked Questions
Will this CMC two-stage trigger fit my AR-15?
It's designed for standard small pin mil-spec receivers using .154-inch trigger and hammer pin holes, which covers most AR-15, AR-10, and LR-308 lowers. It does not fit Colt AR-15 rifles equipped with a sear block. If you aren't sure of your pin size, press a pin partway out and measure it: .154 is small, .172 is large.
How hard is the CMC curved drop-in trigger to install?
It's one of the easiest AR upgrades you can do. The assembly drops in as a single self-contained unit and locks down with the included oversized pins and set screws, so there's no fighting loose springs or C-clips. Most people finish the swap and function check in under twenty minutes, just remember to keep the pinset screws at or under 12 in-lb.
Can I adjust the pull weight on this 1-3 lb trigger?
No, this model is factory preset and not user adjustable. It comes tuned to a roughly 1 lb first stage with a 3 lb second-stage break, which gives you a defined wall to stage against before the shot. CMC sets it at the factory so the feel is consistent right out of the box.
What's the difference between the two-stage and a single-stage CMC trigger?
A two-stage gives you a lighter first stage of take-up and a distinct wall before the break, so you can settle your sights and stage the trigger before committing to the shot. That makes it well suited to precision and marksman-style shooting. A single-stage breaks with almost no take-up and is often preferred for faster, more dynamic use.





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