CMMG AR-15 Complete Lower Parts Kit - Premium LPK for AR-15 Builds

Building an AR-15 from a stripped lower receiver? The CMMG AR-15 Complete Lower Parts Kit gives you all the internal components needed to finish the fire control group and trigger assembly without hunting down a dozen individual parts. This is your one-stop solution for getting a bare lower to functional status—no compatibility guessing, no missing springs at the bench.

CMMG's LPK includes everything from the A2 pistol grip and safety selector to the trigger, hammer, disconnector, and all associated springs, pins, and detents. Whether you're assembling your first AR or building your tenth, having all these pieces together saves frustration and keeps your build on track. The kit is designed for AR-15 platform rifles and covers both the fire control group and the small mechanical parts that make the lower receiver work.

This complete lower parts kit is ideal for home gunsmiths, competitive shooters, and hunters who prefer to assemble their own firearms. It's the kind of practical, no-frills component kit that serious builders rely on when they want quality parts without unnecessary markup. Everything you need is in the box.

Key Features

• Complete fire control group: trigger, hammer, disconnector, and springs included
• A2 pistol grip with hardware
• Safety selector and all detent components
• Magazine catch assembly and release button
• Alloy trigger guard with roll pin
• All takedown and pivot pins and springs
• Buffer retainer pin and spring
• Bolt catch assembly with spring and roll pin

Specifications

Frequently Asked Questions

What parts come in the CMMG AR-15 complete lower parts kit?

The kit includes the A2 pistol grip, trigger and hammer assembly, disconnector, safety selector, magazine catch assembly, trigger guard, bolt catch, buffer retainer, takedown and pivot pins, detent springs, and all associated fasteners needed to assemble a functional lower receiver.

Will this lower parts kit work with my AR-15 build?

Yes, this LPK is designed for AR-15 platform rifles. It contains all the small parts and fire control components needed to complete a stripped AR-15 lower receiver.

Do I need any tools to install this kit?

We've provided the parts themselves; you'll need standard gunsmithing tools and AR-15 assembly knowledge or a qualified gunsmith to properly install and function-test the components. Many builders reference manufacturer assembly guides during the process.

Is this kit legal to purchase?

Lower parts kits are accessories and ship as components. Always comply with federal, state, and local firearms laws before purchasing or building. Check your local regulations.