I like that setup Misery.
There are a couple different ways of doing it. I do like the way the swivel is on the side of the stock which makes more sense than the underside of the stock, to me anyway. Especially carrying it.
There are slings like the Gear Sector 2 point, which can be used with adapters that wrap the stock and create a sling point on the side of the stock. Actually, you can probably purchase just the adapters and use nearly any sling of your preference.
I like the barrel/magazine tube mounts too with a QD, but ill second the limited rotation.
EDIT
just read LES' post about canting the mag tube extension. Good point I hadn't considered.