CMC AR15/AR10 Lower Receiver Kit with Single Stage Flat Trigger - 3-3.5 lb Pull

Building an AR-15 or AR-10 from the ground up gives you total control over the final product—so why settle for a lower receiver kit loaded with parts you'll never use? The CMC AR15/AR10 Lower Receiver Kit with Single Stage Flat Trigger strips away the waste and pairs a purpose-built lower parts kit with CMC's renowned single-stage trigger in a crisp 3–3.5 lb pull. If you've already chosen a CMC trigger for your build, this kit eliminates the redundancy of buying a standard lower parts kit with a mil-spec trigger and springs you'll just set aside. You get everything else your lower needs—bolt catch assembly, magazine release, safety selector, trigger guard, takedown pins, and detents—all engineered to or exceeding military specifications. The flat trigger bow gives you the ergonomics and control many precision shooters prefer, especially for target work or hunting where trigger feel matters. All that's left to complete your lower is adding the grip of your choice.

CMC Triggers has built a reputation for consistency and reliability in the competition and hunting communities. This kit reflects that attention to detail: every component meets or exceeds MIL SPEC, so you're not compromising on durability or function. Whether you're assembling your first AR or your fifth, eliminating unnecessary parts keeps your build cleaner, your costs focused, and your finished rifle tuned exactly the way you want it.

Note that the grip is sold separately—this is a lower receiver parts kit, not a complete lower assembly. If you're already committed to running a CMC trigger, this is the logical choice for your next build.

Key Features

• Single-stage drop-in trigger with 3–3.5 lb pull weight for clean, predictable breaks
• Flat trigger bow design for enhanced control and ergonomics
• Paired kit eliminates redundant mil-spec trigger and hammer springs
• Includes all essential lower parts: bolt catch, magazine release, safety, trigger guard, takedown pins, and detents
• All components meet or exceed military specifications
• CMC Triggers product warranty included
• Compatible with AR-15 and AR-10 platforms

Specifications

Frequently Asked Questions

What's included in this CMC AR-15/AR-10 lower receiver kit?

The kit includes the CMC single-stage flat trigger, bolt catch with plunger and spring, bolt catch roll pin, magazine release with button and spring, buffer retainer and spring, safety with detent and detent spring, trigger guard with roll pin, takedown pins, and takedown detent springs. Grip is not included.

Will this trigger work in my AR-15 lower?

Yes. This kit is designed for both AR-15 and AR-10 platforms and functions as a drop-in trigger assembly.

Do I need anything else to finish my lower receiver?

You'll need to add a grip of your choice. All other critical components are included in the kit, and all parts meet or exceed MIL SPEC standards for reliable function.

Why would I choose this kit over a standard lower parts kit?

If you're already committed to using a CMC trigger, this kit eliminates the redundancy and cost of buying a standard lower parts kit that includes a mil-spec trigger, hammer, and associated springs you won't need. You get only the parts that matter for your build.