Core HX 3-9x40VHRDescription Designed by Sightmark, the Core HX3 9x40 VHR was developed primarily for hunting and recreational shooting. The tube is precisely machined from 6061 T6 aluminum alloy covered in a scratch resistant anodized matte finish. The scope is sealed and filled with nitrogen to prevent fogging of the lenses. An IP67 rating makes it water and dust resistant as well as shock proof. Applied glass is covered in anti reflection multi coating with a 3. 7