The attached picture shows a players arm fully extended out at a 90 degree angle, wrist bent backwards as well.
Some players were running around with invisible guns at times for short periods of time (generally noticed during the spectating while dead).
Rifles would clip through the shoulder (tried to get a pic but the characters kept moving). When aiming, the rifle rests in the shoulder pocket, as it should, but at times the buttstock will actually enter the shoulder/body of the character.
Just a few things I've noticed. Great game so far.