Trijicon Ring Mounts w/ Q-LOC Technology feature a 30mm tube, and are designed to keep the optic as low as possible for hunting and long range precision rifle applications. Featuring a Mil-Spec drop test rated 6061-T6 aluminum design and an easy to use one handed tool less mounting system. The spring-loaded design allows for constant retention and maintaining of zero even if the knobs are not tightened. The Ring mounts boast a low profile design with superior return to zero performance and are compatible with any Mil-Spec or NATO Picatinny rail. Designed specifically for variable power optics, these rings are perfect for mounting Trijicon variable power optics with an objective lens up to 40mm on any weapon platform with a full Picatinny rail.