ATI AR15 Milsport Stripped Lower Receiver .223 Rem 810113115160 (UPC 810113115160)

The ATI AR15 Milsport Stripped Lower Receiver .223 Rem 810113115160 (UPC 810113115160) is a high-quality, mil-spec forged lower receiver designed for builders who want to create a custom AR-15 rifle or pistol. Manufactured by American Tactical Imports (ATI), the Milsport stripped lower offers a solid foundation for any AR-15 build. Machined from durable 7075-T6 aluminum and finished with a tough hardcoat anodizing, this lower receiver meets or exceeds military specifications for strength, reliability, and fitment. Whether you’re assembling your first AR-15, building a competition rifle, or creating a dedicated home defense firearm, the ATI Milsport stripped lower provides an excellent starting point at an affordable price.

Stripped lower receivers are the core component of any AR-15 build. The ATI Milsport model gives builders complete freedom to select their preferred trigger group, safety selector, buffer system, and stock or brace, allowing for a truly personalized firearm.

Premium 7075-T6 Aluminum Construction

The ATI Milsport stripped lower is forged from 7075-T6 aluminum, one of the strongest aluminum alloys used in firearm manufacturing. This material provides exceptional strength-to-weight ratio and resistance to stress and impact. After forging, the lower is precision machined to mil-spec dimensions, ensuring compatibility with virtually all standard AR-15 upper receivers, parts kits, and components. The hardcoat anodized finish adds an extra layer of protection against corrosion, scratches, and wear, helping the lower maintain its appearance and structural integrity over time.

Mil-Spec Dimensions for Reliable Fitment

The ATI Milsport stripped lower is manufactured to strict mil-spec tolerances. This ensures that it will properly interface with standard AR-15 upper receivers, trigger groups, and other components from a wide variety of manufacturers. Builders can confidently use this lower with mil-spec or aftermarket parts without concerns about fitment issues. The receiver features a standard fire control pocket, magazine well, and buffer tube threads, making it compatible with both carbine and rifle buffer systems.

Perfect Foundation for Custom AR-15 Builds

One of the biggest advantages of purchasing a stripped lower receiver is the ability to fully customize your build. With the ATI Milsport lower, you can select your ideal trigger (drop-in, single-stage, or two-stage), safety selector, pistol grip, stock or brace, and buffer system. This level of customization allows builders to create a rifle tailored to their specific needs, whether for competition, home defense, plinking, or long-range shooting. The Milsport lower serves as a blank canvas for both first-time builders and experienced gunsmiths.

Ideal Applications

• Custom AR-15 rifle builds
• AR-15 pistol builds
• Competition and 3-Gun rifles
• Home defense and personal protection firearms
• Budget-friendly AR-15 builds
• First-time AR-15 builders
• Replacement lower for existing builds

Why Choose the ATI Milsport Stripped Lower Receiver?

• Forged 7075-T6 aluminum for superior strength
• Mil-spec dimensions for broad compatibility
• Hardcoat anodized finish for durability
• Affordable entry point for custom builds
• Lightweight yet extremely rugged construction
• Backed by ATI’s reputation in the firearms industry
• Ready for any standard AR-15 parts kit

The ATI AR15 Milsport Stripped Lower Receiver .223 Rem 810113115160 (UPC 810113115160) is an excellent choice for anyone looking to build a custom AR-15. Forged from high-strength 7075-T6 aluminum and finished with a durable hardcoat anodizing, this mil-spec stripped lower receiver provides a solid and reliable foundation for any AR-15 project. Its precise machining ensures compatibility with a wide range of upper receivers, trigger groups, and other components, giving builders the freedom to create a truly personalized firearm. Whether you’re assembling your first AR-15, building a competition rifle, or putting together a dedicated home defense weapon, the ATI Milsport stripped lower offers outstanding value and performance. The black hardcoat anodized finish provides excellent corrosion resistance and a professional appearance. Because it is sold as a stripped lower, it allows complete customization of the fire control group, stock, and other accessories. For builders who want a quality mil-spec lower receiver at an affordable price, the ATI Milsport model delivers the strength, fitment, and versatility needed to complete a successful AR-15 build. With its proven construction and broad compatibility, this lower receiver is a smart starting point for any custom AR-15 project.

Start your custom AR-15 build with the ATI Milsport Stripped Lower Receiver.