While the VX3i is a good scope ( reasonably good glass & nice & light ) the VX5 is a step above ( good usable zoom range 3-15, good reticle choices, great zero stop turret, great glass & eye piece ) they are a little bigger & heavier than a vx3 & you'll have to get some 30mm rings, but In my opinion that's out weighed by their performance advantages.
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