Nemesis Argo Phaser Cannon
From the movie Star Trek Nemesis, the Argo buggy (part of the Argo heavy shuttlecraft) was used on Kolarus III to transport Captain Picard, as well as Commanders Data and Worf, around its surface. It was on this planet where the Soong-type android (and Data’s “brother”) B-4 is recovered.
During the away mission, the away team is attacked and Worf uses this rear-mounted phaser cannon on the Argo buggy to return fire on their attackers. That piece of the buggy will be available in Propworx’s 2011 Star Trek auction.