The Dirty Bird Industries M16A1 20″ 5.56 Retro Upper Assembly is the next iteration in the line of DBI’s popular Complete Uppers. Dirty Bird Industries has sourced some of the finest parts in the industry to make sure that this complete upper is not only a great throwback build and aesthetically accurate, but also performs flawlessly in the field by taking advantage of modern enhancements to the platform.
Notable enhancements include: 1:9 twist instead of 1:12 which will stabilize a greater variety of bullet weights and a black class 3 type 2 anodizing to match most modern mil-spec lower receivers.
20″ 5.56 Lightweight Contour 1:9 Rifle Length Barrel w/ FSB
- Chambered in 5.56
- 1:9 Twist Rate
- Button Rifled
- A2 Front Sight Base w/ Front Sight Post Installed
M16A1 Assembled Upper Receiver
- 7075-T6 Forged Aluminum
- Factory Installed Teardop Forward Assist & Dust Cover
- Factory Installed Dual Aperture Rear Sight
- Fully Compatible with any Mil-Spec Lower Receiver
A1 Triangle Handguard
A1 3 Prong Compensator
Made in the USA – Backed by Dirty Bird Industries’ Limited 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.








