Where can you get ammonium perchlorate?

Answer 1

You don't need to know because making your trying to make BOMBS illegally.

Terrible grammar aside; the person posting the above response doesn't understand that there are alot of legitimate uses for Ammonium perchlorate. The most common use is in model rocketry for the hobbyist. Why does he automatically assume that somebody looking for NH4ClO4 is involved in bomb making?

I agree, ammonium perchlorate is great for rocketry, but expensive and hard to find because everyone thinks it is used for bombs and nothing else. Also, if someone was going to make a bomb they would use ammonium nitrate because it is much cheaper.