Daniel Defense DDM4 — Complete Lower Receiver Group

Daniel Defense DDM4 AR-15 Complete Lower Receiver Group

Get a genuine Daniel Defense foundation for your next AR-15 build with the DDM4 Complete Lower Receiver Group — a fully assembled lower that skips the parts-hunting and gets your build moving faster.

The Mil-Spec forged 7075-T6 aluminum lower receiver features a flared magazine well for quicker, more reliable reloads, finished with a Type III hard coat anodization for genuine long-term durability. This complete lower ships with a Mil-Spec trigger, an ambidextrous safety, an H buffer to help reduce recoil and smooth out cycling, a 6-position carbine receiver extension, and a rear receiver QD swivel attachment point for flexible sling setup options. Daniel Defense's own polymer buttstock and pistol grip round out the build, giving you a genuinely complete, ready-to-pair lower rather than a stripped receiver you need to build out piece by piece.

Whether you're building a new AR-15 platform rifle from the ground up, want a genuine Daniel Defense lower without sourcing and assembling every individual component yourself, or need Mil-Spec reliability as your build's foundation, the DDM4 Complete Lower Receiver Group gives you a real head start with trusted DD quality throughout.

All firearm sales are subject to a completed background check and applicable federal, state, and local laws. In-store purchase or FFL transfer required.

Frequently Asked Questions

Q: What caliber is this lower receiver group built for?
A: It's built for 5.56x45mm NATO AR-15 platform rifles.

Q: What's included in this lower receiver group?
A: A Mil-Spec trigger, ambidextrous safety, H buffer, 6-position carbine receiver extension, QD sling swivel attachment point, and Daniel Defense polymer buttstock and pistol grip.

Q: What is the receiver made of?
A: It's CNC machined from 7075-T6 aluminum with a Type III hard coat anodized finish.

Q: Does this lower receiver group come with internal parts already installed?
A: Yes, this is a complete lower receiver group, not a stripped lower — it ships with the trigger, safety, buffer, and stock/grip already assembled.

Q: What does the flared magazine well help with?
A: It's designed for quicker, more reliable magazine insertion and reloads.

Q: What does the H buffer do?
A: It helps reduce recoil and contributes to smoother, more reliable cycling.