The disabled Humvee the Marines come across has '507' painted on its side to denote it belongs to the 507th Maintenance Battalion. Such designations are not painted on the sides of the vehicles. They're painted on the bumpers.
The Company gets to the bridge and Sgt. Colbert is observing. His binoculars are duct-taped on the front leaving horizontal slits but his sight picture is shown as a full circle.