Purchase the Dirty Bird 20″ M16A2 Enhanced 5.56 Retro Upper Assembly here!

The Dirty Bird Industries M16A2 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 1:7 which will stabilize some of the most common bullet weights out there, a lightweight contour, 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

M16A2 Assembled Upper Receiver

  • 7075-T6 Forged Aluminum
  • Factory Installed Mil-Spec Forward Assist & Dust Cover
  • Factory Installed A2 Rear Sight
  • Fully Compatible with any Mil-Spec Lower Receiver

A2 Style Handguard

A2 Flash Hider

Comes with a Non Chrome-Lined or Chrome-Lined Barrel

Made in the USA – Backed by Dirty Bird Industries’ Limited Lifetime Warranty

Take a look at our other AR-15 Complete Uppers here!