For being Jonathan Sheppard's first attempt at papercraft design, I think he did an excellent job. This 8" (20 cm) long papercraft phaser rifle was modeled after the version of the weapon that appears in the video game Star Trek Voyager: Elite Force and the movie Star Trek: First Contact. A PDF template of the rifle is available from Sheppard's deviantArt page here.
I have been itching to try my hand at creating some papercraft from 3D models ripped from video games and since I do have a copy of Elite Force... be on the lookout for some Star Trek papercraft of my own in coming weeks.