The Daniel Defense 30mm Optics Mount Double Ring will accommodate a wide variety of variable power scopes with 30mm tubes. The variable power double ring mount has a weight of only 5.5 ounces. Precision CNC machined from aircraft grade 6061-T6 Aluminum and Military Specification Type III Hard Coat Anodized black. Feature the Daniel Defense Rock & Lock mounting technology for easy installation and removal with Torx Plus fasteners at the base and rings. Made in the USA!