Vortex Optics RAZOR HD 5-20X50 RIFLESCOPE — First Focal Plane User Manual
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RZR Zero Stop Adjustment
Vortex Razor 5–20x50 riflescopes incorporate 
the RZR Zero Stop feature. After the 
rifle is sighted in, the RZR Zero Stop 
allows fast, easy return to the original 
zero point when large multi-revolution 
elevation corrections have been dialed 
into the riflescope.
Without a zero stop, the shooter must pay very careful 
attention when dialing large corrections needing multiple 
revolutions of the elevation knob. If the shooter loses track of 
the number of revolutions, the original zero point may become 
lost. Because of the RZR Zero Stop, the elevation knob on 
Vortex Razor scopes can be quickly spun back to the original 
zero without having to carefully count revolutions. Once the 
RZR Zero Stop is set, the elevation knob will stop turning at 
the original zero point when being returned from a temporary 
elevation correction. Learn how to adjust the RZR Zero Stop 
in the Bore Sighting and Range Sight-in sections.
Variable Power Adjustments
The Vortex Razor HD 5–20 x 50 riflescope uses a variable 
intensity reticle illumination system to aid in low light 
performance. To activate the illumination, rotate the 
adjustment knob in a clockwise direction. The illumination 
knob allows for 11 levels of brightness intensity; an off click 
between each level allows the shooter to turn the illumination 
off and return to a favored intensity level with just one click. 
The top setting (11) is visible in the daytime, depending on 
the background color. Settings below 11 are for low light use 
when the user’s eyes have adjusted to lower light levels. Lowest 
settings are for use with night vision devices.
Illumination Adjustments
Turret Rotation
Vortex Razor riflescopes incorporate the Radius Bar to 
visually assist in keeping track of 
turret rotations. By watching the 
position of the bar while making 
elevation adjustments, the shooter 
is able to quickly track full, half 
and quarter rotations. To get the 
most benefit from the Radius Bar, 
the “0” mark on the turret must be 
indexed with the zero reference line on turret post. 
1. Unscrew the outer cap with a coin.
2. Remove the CR2032 battery.
3. Replace with a new CR2032 battery.
To change batteries:
Radius Bar
Battery Cap
MagView
To change magnifications, turn the 
magnification ring to the desired 
level. The Vortex MagView system 
will provide a low light reference 
for magnification level.