Anti-protons exist. Containing them is very difficult, but again, possible. And since they are charged, they could be accelerated into a beam pretty easily once you solve the containment problem, so yes, they are possible.
Thanks slick so from now on my I-lasers are now officially just extremely powerful AP stream weapons
__________________
When life gives you lemons take them and squeeze them in life's eye until it gives you the oranges you asked for!
"If men build things to look like our penis such as towers and ships does that mean female achitects represent women having penis envy?"
A line that made me chuckle, I can't remember where I heard it I just know it made me laugh.
"I'm not really a slapper....I mainly punch and gouge."
Tammy Lee my kung fu instructor/sifu's daughter when asked if she ever slapped a boy for saying something nasty to her.