Billet AR-15 Lower Receiver

This Billet AR-15 Lower Receiver is the foundational component for building a precise and reliable rifle. Machined from a solid block of 7075-T6 aluminum, it offers superior strength and meticulous tolerances compared to forged lowers. Whether you’re assembling your first AR-15 or building a dedicated competition or duty rifle, this receiver provides a rock-solid starting point. Miami Shooters Supply ensures you get this core AR-15 part quickly with our commitment to fast shipping.

Key Features

• CNC-machined from a solid 7075-T6 aluminum billet for enhanced rigidity and a unique aesthetic.
• Features an integrated trigger guard for a seamless, snag-free design.
• Precisely machined pivot and takedown pin holes for a tight fit with your upper receiver.
• Flared magwell design facilitates faster and more reliable magazine changes.
• Annodized to a Mil-Spec hard coat finish for exceptional corrosion and wear resistance.
• Compatible with standard AR-15 parts kits and most aftermarket triggers, grips, and stocks.

Built For

This billet lower is ideal for the builder who values a precise fit and a distinct, machined look for their custom AR-15. It’s the right choice for a serious duty build, a competition firearm, or any project where foundational quality is non-negotiable. You’re not just buying a lower; you’re selecting the backbone of your rifle.

Specifications

• Material: 7075-T6 Aluminum Billet
• Caliber Compatibility: Multi-Caliber (5.56 NATO / .223 Remington, .300 BLK, and more)
• Finish: Type III Hard Coat Anodized (Black)
• Fire Control Pocket: Mil-Spec, compatible with most drop-in triggers
• Receiver Extension Threading: Standard 1-3/16″-16 Thread (Mil-Spec)

FAQ

Is this lower receiver stripped or complete?
This is a stripped AR-15 lower receiver. It requires a lower parts kit, buffer kit, stock, and grip to become a functional firearm.

Does this billet lower work with any AR-15 upper?
Yes, it is machined to standard Mil-Spec dimensions and is designed for reliable fitment with the vast majority of AR-15 upper receivers. Always perform a basic function check after assembly.