ATIBAL AT-M15 1.5-5x Magnifier with Flip to Side Mount Variable 1.5 to 5x manual magnification control Fully compatible with ATIBAL, Aimpoint, ACOG, and EOTech holographic sights Anti reflective coating. Fog proof internal sealing. Light weight and shockproof 30 mm Flip-to-Side Quick Detach (QD) mount. Flip orientation is ambidextrous allowing left or right flip. 30 mm top ring can be removed with QD lever. Suitable for any 30 mm diameter parts. Mount on 20 mm Weaver or Picatinny rail