Corrected entry: Just before Stu makes his public "confession" from the phone booth, a SWAT member is shown on the balcony, loading a rubber bullet round into a 12 gauge shotgun. In the extreme close-up, he releases the spring-loaded receiver with the touch of his finger and it snaps shut (plainly indicating that it is a semi-automatic shotgun). However, in the immediate next camera shot, the SWAT guy is now handling a tactical pump shotgun. Pump shotguns do not have spring-loaded receivers.
Charles Austin Miller
15th Oct 2015
Correction: The Benelli M3 can be used as semi auto or pump. This shotgun resembles the M3 quite closely.