Glad your looking with AO. Here's my recommendation.Amazon.com: Mueller 4.5 - 14x40 mm AO Tactical Scope: Sports & Outdoors
I've heard many good things about Mueller scopes, that just might be the ticket.
I just bought an APV 4.5-14X Mueller...an excellent .22 scope. It has an objective that's adjustable down to 10 yds and has 1/4" click adjustments. I was blown away by the clear, sharp picture. It's not a Leupold, but it's pretty damn good for the money. Go over to 'RimFireCentral.com" and do a search for Mueller. There are a couple of forum sponsors there that have some good discounts.
Bob
I put a BSA 4-16x40 on my XT-17with the sun shade. I put the same but IR on my XT-22. The round is too small to knock it off zero and there are little set screws to hold the settings on both of mine. And the sun shades look cool on the scopes. With the XT 17 and 22 you can get the medium height ringsand the scope will sit about 1/4 inch from the barrel.
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Not a whole lot louder than the 22 version. The recoil is a little more than the 22lr but its not bad, it's a rimfire. It shoots great. The only problem I found with the rifle was the magazines on the 17. They get loose and wobble and sometimes it's hard to get the round in. I bent the top of the mag out a little so it would hold in better. I haven't had any problems since. On another note to save money, If you decide to get the XT22, the 795 mags will fit it also.
Nice shooting!