DUmb Question...but i dont know Options

[KB-2]

oaky....so heres a lame swap question

okay so i always see people getting the 3-sgte swap.....

but then i see a few people wth a 4age swap

and then theres the beams??? what the fak is beams??

i understand that the 3-sgte packs alot of power.....but what about the others?
how come those arnt as popular? and whats their performacne like?

this has been buggin me, so if someone could answer taht would be great!