This well built accessory from FAB Defense bolts onto a standard AR-15 carbine handguard, and gives you the ability to mount accessories in either the 6 or 12 o'clock position.
Specifications and Features:
FAB Defense Universal Picatinny Rail UPR 16/4
Molded, hardened plastic composite
Special angle designed to position parallel to the barrel
Olive Drab Green
AR-15, M16 and M4 carbines