Geissele MK4 10″ FBI Federal FBI MLOK Handguard. New open box, display model. Never been installed.
Also includes gas block and barrel nut wrench which have never been removed from their factory bags. Barrel nut is mint, never been installed.
This is the older style Federal model, which has the short MIL-STD-1913 rail on the bottom of the handguard.
