Those are the Arctic Warfare sniper rifles built by
Accuracy International. Some very beautiful, VERY expensive, precision rifles. These are among the best in the world. I can't really compare it to the Robar or Barrett, but if I had to make an educated guess I'd say they were superior (but not by much).
The AW and AWP (Arctic Warfare Police, shorter barrel and no muzzle brake) are available in .223, .308, .260 Remington, and "7.08 Remington" according to their page. I suspect that last one is 7mm-08.
AW:
AWP:
The AWM Super Magnum is available in .338 Lapua Magnum, .264 Winchester Magnum, 7mm Remington Magnum, .300 Norma Magnum, and .338 Winchester Magnum.
AWM Super Magnum:
Their AW50 is obviously made in .50 BMG. This pic does NOT do the rifle justice. I've seen one up close and it is big, heavy, expensive, and downright GORGEOUS.
AW50:
Hope this helps.
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