Eotech 555 A variation of the 553 sight with AA batteries (alkaline, lithium or recgargeable). An all black unit with dual ARMS throw levers with a 7mm raised base, 33 ft. submersion rating. AA Battery 65 MOA circle with 1 MOA aiming dot reticle pattern Compatible with Gen I-III+ Night Vision Systems (tandem operation) Includes rugged aluminum hood assembly and knobbed tool-less mounting bolt Interfaces to 1" Picatinny (MIL-STD-1913) rail The EOTech 555 HOLOgraphic Weapon Sight (HWS) is the 1st electro-optic sighting system to apply holographic technology to small and medium-sized weapon platforms. When used in Close Quarters Battle (CQB) environments, the EOTech 555 delivers amazing speed and accuracy gains, uncompromising use of peripheral vision, leaves no muzzle-side optical signature and is packaged in a compact, durable unit. Now deployed with elite Special Forces and SWAT teams the world over, the EOTech 555 delivers vastly improved shooting performance for all levels of operators. The EOTech 555 was designed specifically for the U.S. Marines. Operation Optics: Transmission holography - parallax free Magnification: 1x Eye Relief: Unlimited Length/Width/Height: 5.5"x1.75"x2.75" Weight: 1 lb.,14 oz Temperature: -40 to 150 F Waterproof: Submersible to 66 ft depth Sealing: Fogproof internal optics Color/Finish: Flat Dark Earth (non-reflective black on some small components) or Non reflective black with hard coat finish Adjustment (per click): 0.5 MOA (1/2" at 100 yds) Adjustment Range: +/- 40 MOA travel Mount: Quick release throw levers designed specifically for the Picatinny (MIL-STD-1913) mounting rail: Certain commercial variants of the MIL-STD-1913 rail specifications may not be compatible with the 555.A65/1 mounting assembly. The 555 base consists of (2) ARMS throw levers and is only adaptable to rails that properly accept the ARMS design. Certain commercial variants of the MIL-STD-1913 rail specification may not be compatible with the SU-231/PEQ (M553) mounting assembly. The SU-231/PEQ (M553) base consists of (2) ARMSŪ throw levers and is only adaptable to rails that properly accept the ARMSŪ design. Return to Zero: Repeatable to 1 MOA after re-mounting 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 Electrical Brightness Adjustment Range: 110,000:1 brightest to lowest Night Vision Brightness Range: 1000:1 with NV switch engaged Power Source: 2 x AA batteries Battery Life: 1000 continuous hours with lithium AA: 600 continuous hours with alkaline AA batteries 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 A variation of the 553 sight with AA batteries (alkaline, lithium or recgargeable). An all black unit with dual ARMS throw levers with a 7mm raised base, 33 ft. submersion rating. AA Battery 65 MOA circle with 1 MOA aiming dot reticle pattern Compatible with Gen I-III+ Night Vision Systems (tandem operation) Includes rugged aluminum hood assembly and knobbed tool-less mounting bolt Interfaces to 1" Picatinny (MIL-STD-1913) rail