Tom,
you're looking at PCP's. Great!

There are many many different features, options, considerations. Almost a "universe."
Well, scopes are truly a "universe" by themselves.
So, unless you just want to buy something quickly, just to get started, and it doesn't matter much, and buying another and then another is not really an issue for you —
then it is worth learning a bit more about scopes and how they can assist or hinder you in making good shots — in order to choose a scope that does what YOU NEED it to do for you and your specific shooting scenarios.....

You could read some of the options, functions, and issues involved here:
Hawke 4-16 x 44 mm IR, SF compact on HW95L using Hawke Tactical 2 piece medium rings leaves less than 1/8" clearance for objective lens.
www.airgunnation.com

The two
Scope Specs Tables attached to that post are now outdated, so below I will attach two updated Specs Tables with magnification ranges most relevant to you.
In the introduction of the Tables there is more detailed information why or what specs are significant for which shooting scenarios.
Cheers,
Matthias
Scope Specs Tables ➊ 4-16x | 3-18x | 4-20x
➋ 6-24x | 5-25x | 5-30x | 4-20x
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