As you can see it has a similar profile as the Trijicon ACOG but obviously functions much different.
here are the specs on the Lucid:
• Cast Aluminum Frame• Chemical Rubber Armor
• Lower 1/3 Co-Witness
• 13mm Mounting Nuts
• Reversible Mounting Pins
• Reticles based on a (2MOA) dot
• Weight: 13oz
• Waterproof & Fogproof
• Shockproof (.458 SOCOM)
• Auto Brightness Sensor
• Auto Shut Off (2 hour)
• 7 Brightness Levels
• Battery: 1, AAA (Not Included)
• Easy Access, Leashed Battery Cap
• Capped1/2 MOA Adjustments
• Parallax Free
• 34mm Objective Lens
• 20mm Ocular Lens
• FOV: 35ft @ 100yds
• 1x Unlimited Eye Relief
• Picatinny Rail Mount Built-In
• Available 2x Magnifier
• Available QD Mounting Kit
• Available Kill Flash filter
• Available Leashed Turret Caps
• Limited Lifetime Warranty
The outside is a rubberized "armor"
below is the lower 1/3 co-witness
below is the reticle selector
Just behind the elevation turret is a photocell that changes brightness according to your current lighting conditions. When you initially turn it on it is in the auto brightness mode, press the power button one more time and it will flash and switch to adjustable steady brightness. Should you be in low light (like a dark house) and shooting into brighter conditions, the reticle will probably wash out. That is one thing to consider.
I have been incredibly pleased with this optic and will continue to use it for everything from home defense to hunting.
You can find it on their website http://mylucidgear.com/reddotsights.php