The Vortex®Viper®PSTtm Riflescope Specifically designed for the tactical, law enforcement and committed precision shooting communities, the Viper® PSTTM series of riflescopes offer the highest levels of performance and reliability. With features such as matched turret/reticle subtensions, RZRTM zero stop mechanisms and precision ranging reticles, the Viper PSTs are ready for any situation.
Reticle Options Riflescope Adjustments The Focal Plane Reticle Focus Adjustment All riflescope reticles can be termed either first focal plane (FFP) or second focal plane (SFP), depending upon their internal location within the riflescope. Many Viper PSTs are available in both reticle styles. Vortex Viper PST riflescopes use a fast focus eyepiece designed to quickly and easily adjust the focus on the riflescope’s reticle.
The Subtension Scale: MOA or MRAD Windage and Elevation Adjustments Depending on which version you have purchased, your Viper PST riflescope will feature adjustments and reticles scaled in MOAs or MRADs. If you are unsure of which scale is used, reference the top of the adjustment turret. Vortex Viper PST riflescopes incorporate precision finger adjustable elevation and windage dials with audible clicks. If the adjustment is in MOAs, the turret will display the travel per click in MOA.
Image Focus and Parallax Correction Select Viper PST riflescopes feature a side focus knob which should be used to fine-tune the image focus. When the image is sharply focused, parallax error will also be eliminated. Using the Side Focus Turret Rotation Vortex Viper PST riflescopes incorporate Vortex’s patented Radius Bar to visually assist in keeping track of elevation turret rotations. The radius bar provides a quick visual reference that allows the shooter to confirm: 1.
Variable Power Adjustments RZR Zero Stop To change magnifications, turn the magnification ring to the desired level. Vortex Viper PST riflescopes incorporate the RZR Zero Stop feature. After the rifle is sighted in, the RZR Zero Stop allows fast, sure return to the original zero point when large multi-revolution elevation corrections have been dialed into the riflescope.
Boresighting Initial boresighting of the riflescope will save time and money at the range. This can be done by removing the bolt and sighting through the barrel on a bolt action rifle, or using a mechanical or laser boresighter. 1. Begin by turning the elevation turret clockwise until it stops. No initial preparation is needed on the windage turret. Note that you will not feel “clicks” as the elevation knob is adjusted—this is normal.
Range Sight-in and RZR Zero Stop Set Once the riflescope has been boresighted, final sight-in and RZR Zero Stop set should be done at the range shooting the same ammunition expected to be used in the field. 100 yards is the most common zero distance, although a 200 yard zero may be preferred for long distance applications. As previously noted in the section on Boresighting, the outer elevation turret cap should be removed and zero stop lock screws on inner turret should be loose. 1.
Re-Indexing Windage Turret After Sight In Maintenance 1. Loosen the three windage turret cap retaining screws and carefully pull the windage turret cap straight off. Cleaning 2. Replace windage turret cap, aligning the “0” mark on cap with the zero reference line on scope body. Push the cap straight down and avoid rotating while doing this. Be sure the cap is fully down.
The VIP Warranty We build optics based on our commitment to your absolute satisfaction. That’s why Vortex products are unconditionally guaranteed and we make this Very Important Promise to you—a Very Important Person. Rest assured that in the event your Viper PST becomes damaged or defective, Vortex Optics will repair or replace the riflescope at no charge to you. Call Vortex Optics at 800-426-0048 for prompt, professional, and friendly service.
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