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Vortex Viper PST Gen II Rifle Scope, 3-15x44mm, 30mm Tube, First Focal Plane,, PST-3155 what eyepiece and object sizes needed for butler creek covers — 3 Answers

by Robert, from CA, United States Asked on May 7, 2019

Name Butler Creek Flip-Open Objective Scope Covers (4.6)
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Answered by Ethan C., Gear Expert, from IL, United States, on September 30, 2019

You would need this objective cap: https://www.opticsplanet.com/butler-creek-flip-open-scope-covers.html?_iv_size=31 and this eyepiece cap: https://www.opticsplanet.com/butler-creek-eyepiece-flip-open-scope-covers.html?_iv_size=20

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Answered by Bryant, member, from NC, United States, on July 12, 2022

I just received my two Butler Creek Flip-Up Covers based on this advice (for my Vortex Viper PST Gen II Rifle Scope, 3-15x44mm). The Eyepiece diameter/fit is fine for the eyepiece size 20 but the size 31 for the objective is a hair too small.

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Answered by GlennG, member, from PA, United States, on July 09, 2023

The proper sizes for the Vortex Viper PST Gen II Rifle Scope, 3-15x44mm (PST-3155) are Butler Creek Flip Open 20 Eyepiece (MO20200), and 33 Objective (30330). The actual scope measurements are 1.814" for the eyepiece and 2.091" for the objective. I can confirm these Butler Creek models fit properly as I used them on my own sample of this scope.

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