This detachable AR-15 Picatinny rail mount for carry handle is deigned for mounting a optic scope or red dot while retaining use of your M4, M16 or AR-15 iron sights. This picatinny rail adapter for the AR-15 carry handle is compatible with most Mil-Spec M16,AR15,M4 A1 and A2 receivers with a standard carry handle. This AR carry handle Picatinny - MIL-STD 1913 rail is 5.25" long and constructed of black hard anodized aluminum and includes mounting thumb nut. See-through designed for mounting optics and AR accessories to the top of your carry handle.