The Pulse rifle from Aliens and the Deep Rising assault rifle

M42A1 Short Machinegun from Bubblegum Crisis. it's a 10mm weapon that fires at 850 rounds per minute and feeds high explosive Armor peircing rounds from a 66 shot magazine.

The modified M590A1 (mocked up SIG P220 Sport) from The One was kind of cool, although it was a little lazy of a mock up.

Which Bubblegum Crisis, the original or Tokyo 2040?

The Origional Series. Personally I don't like some of the things they did in the 2040 version. I mean come on Mackie is a frigging boomer!?! Sheesh they had a series with an estabished setting, characters, and cannon. What do they do but toss it out and put in whatever they want....

Wow. Glad I stopped watching after the second video, that's amazingly dumb. It didn't help that ADV gave the poor kid Shinji's voice, either.

The messed up Beretta with a blade on it from.. Blade 2 I think.

Inventive, if a little strange.

Lawgiver from Judge Dredd (comics, not film). Lessee what it has:

1. Normal ammo.
2. Ricochet ammo.
3. Hi-ex ammo.
4. Heatseeking ammo.
5. Armor-penetrating ammo.
6. Incendiary ammo.

That is not something you can easily top in any medium.

Blade's Mac 10 in the first movie

Man from U.N.C.L.E. Walther P-38. and pulse rifle.