It actually is on straight, just the whole rifle is cocked to the side (If you look in the mirror, it looks right). But I myself am not a huge fan on this, mainly because I would never need a .50 cal recoil reducing muzzle break on a .308 rifle. So for looks, yeah, pretty unique. Actually practicality to the real thing, not so much.
Correct, it is on straight, just the rifle is canted.
I personally think it looks ridicules.
Although I wanted to see if it could be done, and surprisingly its a perfect match. Could make for an interesting addition to the M82 though since this also means APS2/M24 silencer adapters will thread onto it.