| Untitled document Only for military and law enforcement customers.
The new 557 has been developed to optimize the functionality of the HWS. The buttons have been moved from the back to the left side for instant access, allowing a magnifier, night vision, or a back up iron sight to fit closely to the HWS body. This new button position allows the user to operate the HWS function switches easier than ever before. Additionally, a portion of the front base has been raised to allow the sight to fit over standard hand guards found on many M-4 or M-16 style weapons.
The 557 is configured with a new ballistic matching reticle image for the M4 carbine. The battle tested circle/dot reticle will be offered along with a series of 1 MOA aiming dots that are vertically aligned and calibrated specifically for the ballistic drop of .223 caliber ammunition. The reticle provides 4 aiming dots for target distances of 0-300m, 400m, 500m, and 600m. • Buttons on left side to work specifically with NV or magnifiers
• AA Battery model (supports Lithium or Alkaline)
• Ballistic reticle specific to .223 caliber munitions
• Compatible with Gen I-IV Night Vision Systems (tandem operation)
• Raised 7mm base Specifications: Operation Optics: Transmission holography - 100% parallax free
Magnification: 1x
Eye Relief: Unlimited
Length/Width/Height: 5.70"x2.1"x2.8" (133x49x71 mm)
Weight: TBD
Temperature: -40 to 150 F (using AA lithiums); -20 to 140 F (AA Alkaline)
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 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: AR223 BDC reticle with additional drop point dots for 400, 500, and 600 meters Electrical Brightness Adjustment Range: 110,000:1 brightest to lowest
Night Vision Brightness Range: 1000:1 with NV switch engaged
Function Button Location: Left side near the rear of sight
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 | 
