Monstrum Tactical Low Profile Picatinny Riser Mount with Quick Release, for Red Dots, Scopes, and Optics (0.5 inch H x 2.5 inch L) Low profile riser mount for red dots, scopes, and optics, allows for sight clearance over front sights 0.5 inch of rise, Picatinny rail mount, will accommodate Picatinny or Weaver standard red dots and optics Attaches and detaches quickly and easily via integrated quick release mechanism Sturdy and lightweight, crafted from aircraft grade 6061 aluminum Available in 1.5 inch (3 Picatinny slots) and 2.5 inch (5 Picatinny slots) versions.