Red dot Sight 556 QD Rail Mounts for Airsoft XPS3-2 Holographic

Red dot Sight 556 QD Rail Mounts for Airsoft XPS3-2 Holographic

Optics:Transmission holography – parallax free
Magnification: 1x
Eye Relief: Unlimited
Length/Width/Height: 3.5″ x 2.4″x 2.4″
Weight:226 grams)
Battery Type: CR123
Waterproof: Submersible to 10 ft depth
Sealing:Fogproof internal optics
Adjustment (per click): 1/2 MOA
Adjustment Range:+/- 40 MOA travel
Mount: 1″ Weaver or Picatinny (MIL-STD-1913) rail，for 21.2mm