I am needing/wanting some type of optic for my 12.5" AR pistol, and plan to be in OKC this Friday, so I'm wondering which stores might have the best selections to check out various brands/models? Still not sure whether I want a red dot or regular type scope, as I know ZERO about red dot scopes. This gun won't be used a lot, so not wanting to spend a bunch of money on it, maybe up to the $150-175 range. I would like to get my hands on several and check them out first, and see what I like best as much as I can. Thanks for any input in advance!