The Vortex AR15 Riser with MT-5108 quick-mount lever allows a red-dot sight to be used on an AR-15 flattop rifle and aligned with mechanical sights.

The riser mounts the red dot on a Picatinny rail at a height suitable for 1/3 co-witness or co-witness alignment. It helps place the sight at the height used by AR-platform carbine sights.

  • Vortex Razor red dot: 1/3 co-witness.
  • Vortex Sparc red dot: co-witness.