The TruGlo 1" 2-piece Picatinny riser mount raises the mounting surface by 1" while limiting additional weight. The 2-piece design reduces adding weight by using 30% less mounting surface than the 1-piece riser. The riser is CNC-machined aluminum. The 1" 2-piece Picatinny riser mount is ideal for mounting scopes, but can be used when mounting red dot style sights as well. Each piece measures about 1.36" Raises mounting surface 1" Mounts directly to existing Picatinny-style rail The 1" 2-piece Picatinny riser mount by TruGlo is great for any AR-15 Flattop. Mfg: Truglo