New, never installed. Im including an M4 barrel so you can install right away. *Note: does not include the faux gas block. Lightweight and looks sick on many m4 builds. Ships fast and free via USPS shipping. Description: - Black Colored Aluminum finish with authentic licensed Fortis markings - Contiguous Milspec 1913 Top Rail and Milspec 1913 rail sections at the front of the rail - Rotation Limited QD Sockets and anti-Rotation Tabs (Fits Forged Style Airsoft Upper Receivers) - True specification KEYMODs mount holes at the 3 & 9 O‘clock