The new G33.STS magnifier is shorter and lighter than previous models. The improved mount provides faster transitioning from 3X to 1X. The G33 offers tool free azimuth adjustment, a larger field-of-view and an adjustable diopter for improved, precise focusing. TECH SPEC: Compatible with all EOTech Holographic Weapon Sights Length/Width/Height: 3.9" x 2.2" x 3.3" (99 x 55.9 x 83.9 mm) Weight: 11.2 oz (317.5 g) Water Resistant: Submersible to 33 ft (10 m) depth Mount: MIL-STD-1913 rail, 1" Weaver Fixed Magnification: 3X Eye Relief: 2.2" (55.8 mm) Field of View: 7.3Adeg Sealing: Fog resistant internal optics