New in box Geissele SMR (Super Modular Rail) MK4 DDC 13.5 inch AR15 handguard. This is the model that the FBI HRT (Hostage Rescue Team) uses. Check out my other listings Text me to @ 830 five zero zero 1890 Pick up near Kirby and 59 Will trade for AR15 barrels that are 16 inches and new or new BCGs (bolt Carrier Groups). $300