The GBRS Lerna mount is a red dot sight riser engineered for shooters who need a higher optic line of sight without sacrificing speed or situational awareness. At 2.91 inches of centerline height, this duty-grade mount positions your RDS above gear that would otherwise block your sight picture—ear protection, comms headsets, gas masks, or night vision—while keeping you in an athletic, head-up shooting posture. That elevated sight plane means faster target acquisition, a more vertical spine under body armor, and the ability to present plates to a threat while maintaining superior situational awareness.

Built from 6061-T6 aluminum and weighing just 4 ounces, the Lerna mount pairs tough construction with minimal bulk. It's purpose-built for the Duty RDS platform and compatible with CompM5s optics, making it a natural fit for duty weapons where helmet-mounted gear or protective equipment is standard. GBRS Group's design philosophy shows throughout: every feature serves the shooter, not aesthetics or marketing hype.

Installation is straightforward with included tools—a long-reach T10 key, long-reach 3/32" hex key, and ¼" drive T25 bit are all in the box, so you're not hunting through your toolbox before you can mount up and head to the range.

Key Features

• 2.91-inch optic centerline height for clear sight picture over gear and body armor
• Aluminum construction (6061-T6) for durability and lightweight performance
• Designed for heads-up shooting posture and faster target identification
• Compatible with CompM5s and Duty RDS optics
• Includes all necessary installation tools
• Weighs just 4 ounces

Specifications

Optic Centerline Height	2.91 inches
Material	6061-T6 Aluminum
Weight	4.0 oz
Compatible Optics	CompM5s, Duty RDS
Included Tools	Long reach T10 key, long reach 3/32" hex key, ¼" drive T25 bit

Frequently Asked Questions

What optics are compatible with the Lerna mount?

The Lerna mount is designed for CompM5s and Duty RDS optics. Verify your specific optic model before purchase.

Will this mount work with night vision or helmet-mounted gear?

Yes. The Lerna mount's 2.91-inch centerline height is specifically designed to position your red dot above night vision systems, communications headsets, ear protection, and gas masks so they don't obstruct your sight picture.

What's included in the box?

The mount comes with a long-reach T10 key, a long-reach 3/32" hex key, and a ¼" drive T25 bit—everything you need to install it.

How much does the Lerna mount weigh?

The mount weighs 4 ounces, keeping overall weapon weight down while delivering aluminum durability.