Personally, I do not see anything wrong with a member of the armed services claiming an Iraqi "firearm" as a souvenir. In most cases, I would presume that such firearms would be unused and in pristine condition. Well, about as pristine as something can be in Iraq.
"Rewards are necessary in order to make the soldiers see the advantage of beating the enemy; thus, when you capture spoils from the enemy, they must be used as rewards, so that all your men may have a keen desire to fight, each on his own account." - Sun Tzu