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