TheTruGlo A 3/4" 2-piece Picatinny riser mount raises the shooting surface by A 3/4" by mounting directly to the existing Picatinny-style rail. It is easy to install and requires no modification. The riser is made of CNC-machined aluminum. The A 3/4" 2-piece Picatinny riser mount is ideal for mounting scopes, but can also be used for red dot sights. Approximately 1.36" in length Raises mounting surface A 3/4" Easy installation The A 3/4" 2-piece Picatinny riser mount by TruGlo is a perfect solution for mounting optics on an AR-15 Flattop. Mfg: Truglo