The Shield is a scrapped Duke Nukem Forever weapon.
Description[]
The Shield appears to be a glass riot shield that would protect the player from enemy attacks. The 2001 trailer shows it absorbing quite a few hits, showing that it would be pretty strong.
It was also able to be used by the Mutated Human.
Fate[]
The Shield appears to have been completely removed, as there is no sign of it in the 2011 footage.