Give your Viper or Venom Red Dot Sight a proper mounting point with the Vortex QR Mount Riser. This compact adapter is designed for these two Vortex sights and features a positive lock and one-handed quick release mechanism. It offers compatibility with Picatinny rails and provides a precise 1/3 co-witness with Vortex Venom sights. To deliver a lightweight yet durable construction, it is manufactured from an aluminum alloy and treated with a corrosion and abrasion-resistant Type III hard anodized finish