This is a Odin Works Upper known as the Upper, model UPPER-Billet-ODIN-1.
When accuracy" perfection" and reliability matters ODIN Works Billet Upper will give you a distinct advantage. With its sleek design "No Forward Assist" and low profile brass deflector it's guarantee to help you stand out in a crowd.
Features:
For AR15
Machined out of 7075 Billet Aluminum
NO forward assist-slick side
Low profile brass deflector
Dust cover included