Not a replica and be prepared to shell out US$607 if you get this at SKDTac which by the way is sporting a spanking new website... "Eotech has done it again by making the best even better. Offering true 2 eyes open shooting, a transversly mounted lithium 123 battery, and 7 mm raised base offering iron sight access, the new Extreme-XPS (EXPS) features easy to adjust side buttons and a single, quick release throw lever for easy attachment and removal.

EOTech EXPS3-2 Holographic Sight

• Single transverse 123 battery to reduce sight length
• Shortened base only requires at most 2 3/4 inch of rail space compared to the  4 inch N battery sights
• Battery cap and latch are eliminated and replaced with a simple O-ring, tethered cap; better sealing is achieved
• Battery compartment is now separated from the base to allow it to hover over the delta ring of the rifle
• Average battery life at brightness level 12 is roughly 500-600 hours, 3X battery life of N cell sights
• Two reticle options: 0- 65MOA circle with 1 MOA aiming dot, 2-65MOA circle with two 1MOA aiming dots
• Side buttons, NV compatible with a single quick detach throw lever

SPECS

Operation

• Optics: Transmission holography -  parallax free
• Magnification: 1x
• Eye Relief: Unlimited
• Length/Width/Height: 3.5in x2.2in x2.4in (91.4X 55.8x71.8mm)
• Weight: 11.2 oz (317grams)
• Temperature: -40 to 150 F
• Waterproof: Submersible to 33 ft depth
• Sealing: Fogproof internal optics
• Color/Finish: Non reflective black with hard coat finish
• Adjustment (per click): 0.5 MOA (1/2in at 100 yds)
• Adjustment Range: +/- 40 MOA travel
• Mount: 1" Weaver or (MIL-STD-1913) rail Adjustable for width variation
• Return to Zero: Repeatable to within 2 MOA after re-mounting
• Night Vision Compatibility: 10 brightness setting (generation I-III+)

Heads-Up-Display Window

• Optical Surfaces: Anti-glare coating
• Window Dimensions: 1.20in x 0.85in (30 x 23mm)
• Front Window Material: 1/8in solid glass
• Rear Window Material: Shatter resistant laminate (3/16in thick)
• Field of View (100 yds): 30 yds (28m) at a 4in eye relief
• Reticle Options: Models include one of the following reticles:65 MOA ring with single 1MOA dot or (2) 1MOA dots and 65MOA ring

Electrical

• Brightness Adjustment Range: 146,000:1 brightest to lowest
• Night Vision Brightness Range: 1280:1 with NV switch engaged
• Power Source: (1) 123 lithium battery
• Battery Life: 600 continuous hours at nominal setting 12
• Brightness Settings: 30 settings with scrolling feature (10 settings for NV use)
• Auto Battery Check Indicator: Flashing reticle upon start-up
• Auto Shut-down: At 8 hrs- programmable to 4 hrs"