I received my Zeus .72 cal today. Where is the owners manual? Also in the plastic bag with the stock mounting-bolt there is another small knob with threaded end, what is this and where does it go?

Thanks for the inquiry. Let's see what we can do to get you a manual. As for the small knob that will thread into the saftey to make it easier to use.

AEA is bad for manuals they don't have a manual for the Challenger pro they keep promising but you'll never see it and I don't think they have them for the 72 caliber as well that little knob is goes on your caulking lever those threaded on there but be careful because that little part is plastic it'll cross through it real real easily. They're excellent guns for the price that you have to pay and they're hard to beat.