Knight's Armament Aimpoint Micro Sight Battery Cap replaces standard cap and allows for an extra battery to be stored on the sight. The battery cap also makes it easier to make brightness adjustments. The battery cap is anodized aluminum with laser engraved Knight's Armament's shield logo.
Note: Two batteries must be used with this battery cap, they should be placed back to back to avoid shorting out. Failure to use two batteries will allow the battery to lose connection causing the sight to not work properly.