Dirty Bird 20" M16A1 5.56 Retro Upper Assembly (no M4 feed ramps)

Dirty Bird 20" M16A1 5.56 Retro Upper Assembly (no M4 feed ramps)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, M4 style feed ramps for improved reliability and a black class 3 type 2 anodizing to match most modern mil-spec lower receivers. 20a ^2 5.56 Lightweight Contour 1:9 Rifle Length Barrel w/ FSBChambered in 5.561:9 Twist RateButton RifledA2 Front Sight Base w/ Front Sight Post InstalledM16A1 Assembled Upper Receiver7075-T6 Forged AluminumFactory Installed Teardop Forward Assist & Dust CoverFactory Installed Dual Aperture Rear SightIntegrated M4 Feed RampsFully Compatible with any Mil-Spec Lower ReceiverA1 Triangle HandguardA1 3 Prong CompensatorMade in the USA - Backed by Dirty Bird Industries' Limited Lifetime Warranty