KoWarrock 8th slot?

I've seen some players in kowarrock with the tmp, l85a1, and barrett, and mp7, and I asked them how to get it. Aparrently, I need 8th slot to get those weapons. So my question:

HOW THE HELL DO I GET 8TH SLOT

you have to play at a cafe in korea

or ask for some korean friend (good,btw) buy it for ya,i already did that

kthnxbai

NOW I KNOW

i THINK that you dont need 8th slot,you can buy them as normal weapons,like m4a1 and etc...
But the cost is higher,as always,just contact one of your korean buddys!