Well this is the answer. The Holy Grail of rifle slings, its a great new idea from Niggeloh.
A rifle sling that securely straps your rifle to you back and can be quickly unhitched and swung round ready to take a shot. The shoulder straps are neoprene lined for comfort, especially if you have a fully spec'd weapon eg: moderator, H/D barrel, bipod etc., and the great thing is that it can also be used as a conventional rifle sling.
The sling swivel attachments are fantastic and have a solid metal switch closure mechanism as well as a velcro strap over attachment.
This is the best sling I've ever owned and would thoroughly recommend it.