Whenever I'v even mentioned an SBR AR in a gun shop, the salesman always tells me how unreliable they are (we're talking 223). Considering this came from a gun shop, I'm not sure how valid this is. I'v heard this from several people, however, but are they really that unreliable? Anyone own an SBR AR or anybody who knows what they're talking about share their thoughts on the subject? thanks!