Daniel Defense's Rock & Lock Rail Mounted Front Sight is easy to install and is highly versatile. Its overall design provides an unobstructed sight picture, and is snag-free to reduce the chance of catching on loose clothing/equipment. The Rock & Lock Rail Mounted Front Sight attaches to the weapon via MIL-STD-1913 picatinny rail and secures itself with a slotted fastener threaded into a self-locking stainless steel thread insert. The Rock & Lock Rail Mounted Front Sight has also been optimized for use with compact weapon lights with a concave radius on either side of the sight as a place to rest your thumb for fast and ambidextrous light activation.