The Leapers or UTG Carry Handle Mount (MNT-992T) adds a picatinny rail to any M4 or M16. The carry handle scope mount fits both detachable handles and the original fixed carry handle. It's a great way to attach an optic to a non flat-top upper, or to add extra height to a scope on any AR.
UTG M4 Carry Handle Rail Mount Features:
-Aircraft Aluminum Construction
-11 Slot Picatinny Rail
-See Through Design Maintains Iron Sights
-Weight: 2.9 oz
-Length: 5.4 Inch