This model is the Geissele clone correct upper. Charlie's has worked closely with Geissele to bring you what you are looking for.
Each URGI is fitted with the handguard Geissele designed specifically for USASOC, the MK 16 M-LOK™ Super Modular Rail handguard with a full-length Picatinny top rail and lots of slots for other accessories. T-markings are engraved on the rail and painted on the receiver
Now, with your choice of a Surefire SOCOM open tine 4-prong or WarComp flash hider.
NFA warning: The Stripped URGI upper receiver group without the pinned flash hider does not meet the 16" minimum barrel length requirement, and requires registration and a tax stamp with the Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE) when assembled into a complete rifle. Please make sure you fully understand NFA and local laws
ITAR warning: This item may only be purchased and shipped to US Persons within the USA. This is a military item, which is restricted from export without US Government permission.