The view of the Pulse Pistols that is probably most recognizable:
A button near the trigger is pressed forward to expand the disks on either side of the pistols. They extend outward by two LEGO studs and are reset by a rubber band.
Each pistol is constructed from 1063 LEGO elements, one non-LEGO rubber band, and LEDs from BrickStuff. No glue, tape, etc. used to hold them together. The three vents on either side of the pistol are made with LEGO stickers saved from kits.
Builds started in late January and complete late March 2017. They could have been built faster but it's hard to build when I'm over 100 miles away from my LEGO most of the time due to school.