This Dirty Bird 20″ M16A1 Enhanced 5.56 Retro Rifle Kit is everything you need to outfit your lower receiver, so that you can have a complete rifle.
Dirty Bird 20″ M16A1 Enhanced 5.56 Retro Complete Upper
20″ 5.56 Lightweight Contour 1:9 Rifle Length Barrel w/ FSB
- Chambered in 5.56
- 1:9 Twist Rate
- Button Rifled
- A2Â 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
- Integrated M4 Feed Ramps
- Fully Compatible with any Mil-Spec Lower Receiver
A1 Triangle Handguard
A1 3 Prong Compensator
NBS Enhanced Mil-Spec Charging Handle
Dirty Bird Industries Enhanced Bolt Carrier Group .223/5.56
- Strategically relocated load bearing surfaces reduce carrier tilt/can’t during recoil, thus increasing reliability and longevity.
- Additional wall thickness in the gas exhaust port area for added strength and rigidity.
The 9310 Bolt is machined to mil-spec dimensions and then the external surfaces including the lugs are CNC ground after the heat treating process to ensure a very precise fit. The bolts themselves feature the same Black Nitride finish as the carrier and are High Pressure (HP) Tested and Magnetic Partical Inspected (MPI) in accordance with Mil-STD-1816 specifications.
KAK AR-15 A2 Buttstock Kit – Black
- Polymer A2 Stock w/ Storage Compartment
- A2 Extension Tube
- A2 Receiver Extension / Buffer Tube
- Chrome Silicon A2 Rifle Buffer Spring
- A2 Spacer
- Assembly Screw
OEM Mil-Spec AR-15 Lower Parts Kit
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.
