Which is the best rear sling adaptor?  Like the B.M.A.S.Tactical Sling Adapter or are there others that are better?

Let me be a bit more specific.  I was in a hurry earlier.  

What im thinking for a rig is this.  A rear sling adaptor, like mentioned above, that mounts just rear of the lower receiver and on the front of the buffer tube of a collapsable stock ( [blue][url=www.bushmaster.com/shopping/bmas/1005-914-2942-t.asp]example[/url][/blue]), accompanied by something like a front sling-thing with a CBQ SOP sling.

Its kind of the sort of set up I had on my MP-5.  I love the feel and handling of the set up that I want to try to match it to my M-4.  Is this even possible or should I just attach it to the end of the buttstock like all the pictures and examples I've seen.

I use this one;
[img]cheaperthandirt.com/ctd_images/product_images/701/ARR-301.jpg[/img]

from [url=www.grsc.com]G.R.S.C.[/url]

I have a SOP sling (excellent sling).  If you want to use the CQB solutions SOP sling and attatch it between the buffer tube and the receiver, I would recommend using the receiver end plate from GG&G.  Check out this address for a picture:  [url]http://www.gggaz.com/products/rnp_sa.php[/url]

I would use the end plate on the left.  I have tried this setup and it works good but when you transition to the rifle slung position, the rifle tilts to much rearward away from your back and is a bit awkward.  I prefer to use the GG&G rear sling adapter that attatches at the rear of the stock.  [url]http://www.gggaz.com/products/slingthings.php[/url]

This attachment point causes to rifle to stay closer to your back and out of the way when in the slung position.