Sci-fi:
1. I've always liked characters that used razor wit first, but were backed by cool weapons.
2. Judge Dredd's Lawgiver pistol. What's not to like? Six modes of fire for the same magazine (Execution (regular bullets), Armor Piercing, Ricochet, Incendiary, High Explosive and Heat Seeker). Voice activation. Blows up if someone else uses it. Sweet!
3. Krull's Glaive
Real:
1. Luger P08 pistol. I've always loved the look of this pistol.
2. NEOSTEAD's bullpup 12 gauge shotgun. 27" long. 13 rounds of shotgun love...Ouch.
3. Magpul Masada Assault Rifle System. More accurate than the M16. Accepts most M16 parts. Modular, so you can switch between 7.62 & 5.56 ammo with the switch of a quick-change barrel. Out of NATO ammo? Fine, pick up the infidel's AK-47 ammo, switch the barrel and continue on your merry way. Win-win.