Smelly AK47

Im just wondering how much 4 ak47 is likely to smell, in a budbox with fan & filter? Would a bigger filter / fan work better?

What else could I use to get rid of any smell I searched around the forum and some one mentioned some block of some kind?

I need 0% smell leakage from the tent / room. ( Is it possible)?

All idea's are welcome I have searched but now I wanna know what people like to use best and why....

Thanks in advance

EDIT: forgot to say im going for a large bud box with a 200watt cfl and a 4inch fan / filter

get a strong fan to vent out of the room and hook it up to a carbon filter or two. should be enough hopefully