Quick Look

The AR-15 lower receiver forms the core of the AR-15 platform, originating in the 1950s as a modular component. Designed for customization and ease of maintenance, it enables shooters to build firearms tailored to their needs. It remains highly popular among enthusiasts for both sport shooting and self-defense applications.

Why It's a Top Choice

• Highly customizable for various builds and calibers
• Compatible with a wide range of aftermarket parts
• Lightweight yet durable aluminum construction
• Easy to disassemble and maintain
• Widely used for sporting and tactical purposes

Key Variants

AR 15 Stripped Lower — Versatile base for custom builds requiring full assembly control.

AR 15 Pistol Lower — Designed specifically for pistol-length barrel builds and compact configurations.

AR 15 Mil-Spec Lower — Meets military specifications for enhanced reliability and durability.

Competitor Comparison Table

Best Use Cases

• Custom rifle builds for sport shooting
• Home defense configurations
• Law enforcement duty rifles
• Competition shooting platforms
• Firearm collection and hobbyist projects

FAQs

Can I use an AR 15 lower to build a pistol?

Yes, AR 15 lowers labeled as pistol lowers are designed for building pistol-length AR platforms with appropriate barrel and buffer tube setups.

What materials are AR 15 lowers typically made from?

Most AR 15 lowers are made from aircraft-grade 7075 or 6061 aluminum, providing strength and lightweight performance.

How does the AR 15 lower affect firearm customization?

The lower receiver houses the trigger group and controls compatibility with stocks and grips, making it the primary foundation for custom builds.