Mercury Reflex Sight vs Holosun 507C X2: RMR Red Dot Comparison (2026)
Mercury vs Holosun 507C X2: specs, reticles, waterproofing, and price compared. Find out which RMR-footprint red dot fits your pistol, PCC, or rifle.

Finding an optic that completes the look of your rifle can be challenging. That’s why Cosmic Tactical™, experts in optic design and engineering, created a line of modern optics and accessories crafted for high performance at a great price.
Meet MERCURY™, the next-generation reflex sight from Cosmic Tactical™. Designed and assembled in the USA, MERCURY™ delivers speed, precision, and durability without the legacy markup.
Its advanced Multi-Reticle System gives you four reticle options, including a crisp 3 MOA red dot, allowing you to adapt instantly to your environment and mission.
With motion activation, top-loading CR2032 battery, and a rugged aluminum body, MERCURY™ is built to perform under any condition.