The DB9 Billet Lower Receiver is an ideal choice for starting your pistol caliber (9mm, 40 S&W, .357 Sig) AR build. Precision machined from a solid block of 7075-T6 billet aluminum and finished with hard-coat black anodizing per Mil 8625 Type 3 Class 2 specifications, you can be sure that this unit is as tough as they come.
This lower receiver accepts any Glock style small frame pistol caliber magazines in 9mm, .40 S&W, .357 SIG, etc. and the mag well features a beveled feed lip for quick and easy mag swaps. Extensive testing and attention to detail also ensure that your Glock style magazines will drop free when released. The proprietary magazine catch and ejector is included and pre-installed from the factory.
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Dedicated 9mm Platform: Engineered exclusively for 9mm builds using Glock®-pattern magazines.
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LRBHO System:Â Features a reliable last round bolt hold open (LRBHO) mechanism for faster and more efficient reloads.
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Ready for Customization:Â Ships stripped, including proprietary magazine and bolt release controls pre-installed, so you can add your preferred grip, trigger, and buffer system.
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Enhanced Ergonomics: Includes an integral trigger guard and a flared magwell tailored to Glock® mags for intuitive reloads and a sleek profile.
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Premium Build Quality:Â CNC-machined from billet 7075-T6 aluminum and finished with a Mil-Spec hardcoat anodize for maximum durability and corrosion resistance.
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Made in the USA:Â Manufactured to the highest standards with a lifetime warranty on materials and workmanship.
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Machined from billet 7075-T6 aluminum
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Compatible with Glock®-style 9mm magazines
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Last round bolt hold open feature
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Nylon upper/lower tensioning screw
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Integrates seamlessly with Mil-Spec AR-15 small parts
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Proprietary mag release and bolt catch pre-installed
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Lifetime warranty
Dirty Bird Industries — Premium AR-15 and AR-10 Components, Built to Last.
Designed for builders who demand uncompromising quality, reliable performance, and accessible pricing without the premium markups common from larger brands.
Founded by Builders, Built to Last
Founded in 2015 by brothers Jay and Dustin Pitcher in a Bakersfield, California garage, Dirty Bird Industries started as a family-owned operation specializing in custom Cerakote finishes and high-quality AR parts. Building on experience from its sister site, AR15Discounts.com, Dirty Bird Industries has grown into a nationwide company with a dedicated team focused on American-made gear that shooters trust.
American-Made Quality and Precision
Through strategic partnerships with leading domestic manufacturers, Dirty Bird Industries sources and develops components using advanced CNC machining, rigorous testing, and mil-spec standards. By managing larger volumes, the company delivers proven, high-end materials and precision engineering at fair prices that meet the high standards set for its own builds.
Proven Components for Serious Builds
Standout offerings include precision-forged 7075-T6 upper and lower receivers, enhanced black nitride bolt carrier groups, single-stage nickel Teflon triggers, free-float M-LOK handguards, complete upper assemblies, and comprehensive lower parts kits. These products create a cohesive selection for everything from custom builds to high-performance rifles nationwide, supported by batch inspections, mil-spec compliance, and ongoing innovations.
Zero Risk Guarantee Program
For total confidence, Dirty Bird Industries backs eligible parts and accessories with its Zero Risk Guarantee Program. This includes free shipping on orders over $50, package protection up to $5,000, lifetime free returns with full refunds within 45 days or store credit after, and expert support. As passionate shooters, the team at Dirty Bird Industries stands behind every product because the company builds, tests, and uses them too, providing authentic value and dependable gear.





