Your subject title is very cryptic...
First it appears that you're trying to pluralize AR. (ARs) But in your post, you only mention having one. Well, you're first should be a given. You can start belly-aching when indeed your little cache consists of numerous ARs... I'm willing to think there's more than one in your future.
The intrigue of the AR itself is enough to want more than one, add this forum to the mix and you've got a recipe for an empty wallet, a closet full of gear and a safe full of fire sticks.
But then, and perhaps it's just a typo- your title also appears to transform AR into a possesive using an apostrophe. ('s) You've only one AR and it already owns you.
Just remember, ARs work well together, you can
own be owned by more than one AR. It's all good. Welcome to the forums.
Sly
Edit to add: I'm not attempting to be a spelling nazi, it's jut my tinfoil hat shrunk in the washer.