CMC AR-15 Lower Parts Kit with Curved Trigger - Premium Quality Components

Building an AR-15 lower receiver doesn't mean buying parts you'll never use. The CMC AR-15 Lower Parts Kit with Curved Trigger pairs a complete set of small components with one of CMC Triggers' Single-Stage Drop-In 3.5-pound triggers, so you get everything you need without the surplus. This kit skips the mil-spec trigger and hammer springs you won't install—it's built for shooters ready to upgrade to a quality aftermarket trigger from day one.

The curved trigger bow design offers a traditional control surface for shooters who prefer that ergonomic feel. All included parts meet or exceed MIL SPEC standards, meaning they'll perform reliably in a duty rifle, competition build, or hunting gun. Everything from bolt catch to safety detent, takedown pins to magazine release, is engineered to the same exacting spec you'd expect from a serious components maker.

Whether you're assembling your first precision rifle or your fifth, this kit eliminates the guesswork of sourcing individual parts and the waste of paying for items destined for the spare box. Once you've installed these components in your lower receiver and added a grip, you're ready to mate it with your upper assembly and get to the range.

Key Features

• Includes CMC Triggers Single-Stage Drop-In trigger (3.5-pound pull, curved bow)
• All parts meet or exceed MIL SPEC standards
• Complete lower parts kit—no unnecessary redundant trigger or hammer springs
• Contains bolt catch, safety, magazine release, trigger guard, takedown pins, detents, and springs
• Backed by CMC Triggers product warranty

Specifications

Brand	CMC Triggers
Platform	AR-15
Trigger Type	Single-Stage Drop-In
Trigger Pull Weight	3.5 pounds
Trigger Bow	Curved
Parts Standard	MIL SPEC or better

Frequently Asked Questions

What's included in this lower parts kit?

The kit contains the bolt catch assembly (catch, plunger, spring, and roll pin), magazine release assembly (button and spring), trigger guard with roll pin, safety detent assembly (detent and spring), buffer retainer spring and retainer, takedown pins with detents and springs, and the CMC Triggers 3.5-pound curved-bow trigger. A grip is not included.

Why doesn't this kit come with a standard mil-spec trigger?

CMC Triggers designed this kit specifically for builders who plan to use one of their quality aftermarket triggers. Since you won't use a mil-spec trigger or its associated springs, this kit eliminates that waste and redundancy, letting you buy only what you'll actually install.

Can I choose a flat trigger instead of curved?

Yes—CMC offers both curved and flat trigger bow options. This particular kit ships with the curved bow; verify the listing or contact us if you need the flat-bow version.

Do I need anything else to complete my lower receiver?

Once you install this kit, you'll need to add a grip of your choice to finish the lower. After that, your lower is ready to pair with an AR-15 upper assembly.