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.

FEATURES:
* 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

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) ARMS® throw levers and is only adaptable to rails that properly accept the ARMS® 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

555
Reticle	65 MOA circle w/ quadrant ticks with 1 MOA aiming dot
Batteries	Two AA Batteries
Battry Life	1000 continuous hours with lithium AA: 600 continuous hours with alkaline AA batteries at nominal setting 12
Features	Night Vision Compatible