Far and away the most popular optic put out by EOTech is their model 552.  It is the standard sight used by most U.S. government agencies including the DEA, ATF, and FBI SWAT.  Being night vision compatible and very thoroughly tested it is also a favorite unit of many in the military.  It's a battle proven sight thtat should stand up to whatever abusive activity or nasty environment you can find to run it through.

The EOTech 552

-is compatible with Night Vision Systems (Gen I-IV)

-runs on a AA battery (lithium or alkaline)

-uses a 65 MOA ring with a 1 MOA dot as its reticle

-includes rugged aluminum hood assembly and knobbed mounting bolt

-mounts to 1" Picatinny (MIL_STD-1913) rail

EOTech 552 Electrical Specs

* Brightness Adjustment Range: 146,000:1 brightest to lowest
* Night Vision Brightness Range: 1280:1 with NV switch engaged
* Power Source: 2x 1.5V AA batteries (supports lithium, alkaline, or rechargeable)
* Battery Life: 1,000 continuous hours (lithium) at nominal setting 12; 600 continuous with AA alkaline
* 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

EOTech 552 Operational Specs

* Optics: Transmission holography - 100% parallax free
* Magnification: 1x
* Eye Relief: Unlimited
* Length/Width/Height: 5\"x1.8\"x2.25\" (131x49x60 mm)
* Weight: 11.5 oz (326 grams)
* Temperature: -40 to 150 F (using AA lithiums); -20 to 140 F (all other battery choices)
* 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 (1/2\" at 100 yds)
* Adjustment Range: +/- 40 MOA travel
* Mount: 1\" Picatinny (MIL-STD-1913) rail
* Return to Zero: Repeatable to 1 MOA after re-mounting

EOTech 552 Heads-Up-Display Window

* Optical Surfaces: Anti-glare coating
* Window Dimensions: 1.20\" x 0.85\" (30 x 23mm)
* Front Window Material: 1/8\" solid glass
* Rear Window Material: Shatter resistant laminate (3/16\" thick)
* Field of View (100 yds): 30 yds (28m) at a 4\" eye relief
* Standard Reticle: 65MOA circle with quadrant ticks with 1 MOA aiming dot