[Looter]

Hi SL! You just have to eyeball them. Hold the rifle out in front of you and look down the centerline to see if the front sight base or gas block is canted.

I would echo what others have said about the Romanians being a good starter. Is there a Dunham's Sports near you? They usually have some in stock that you can eyeball.

Also check out the gun shows, pawn shops too. You never know what you might find.