Sadly, No you cannot get rental armour but don't feel bad. I first started playing with without armor and nothing hurt me when I Got hit with a bb. Just make sure you wear 2 layers of clothes and save money for armour.
Rental cost start at $30.00 and include an all metal AEG, magazine, full face protection and 1000 bbs. Upgrades and add ins are available for additional fee. We do not have body armor or vests/chest rigs available for rent.
My experience with Op31 is that there are always rental airsoft guns avail $15.00 for the days session. I don't know about armour my son has his own, I have seen plenty play without.
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