https://www.firearmsnews.com/editorial/ruger-pc-carbine-review/375797The main point of this long review is this: "So you get all the bulk of a true rifle, with almost none of its advantages."
I think it's a valid summary... yet I own a Ruger PCC. It's not as loud as AR, let alone a shorty AR. It's basically the best you can get without a can.