Ar15 Carry Handle Adapt 5 Us Ncstar Mar6: • Adapter Rail for a Carry Handle. Allows you to mount an optic onto the carry handle using Weaver/ Picatinny type rings & mounts. • Compatible with NATO STANAG rings • Attached to the Carry Handle via the supplied Thumb Nut.. Not tools required. • See-Through Mount, when mounted onto the Carry Handle you can still utilize the Iron Sights. • All Aluminum Construction. • Weight: 2.3 oz.