To comment on a few recent posts. We can look at pretty much any art and see weapon defense techniques. However, and I have heard what I'm about to say from a few other people, so I personally place alot on this.....if its not a weapon based art, it won't be as good as one that is. In other words, while Kenpo has knife and club techs., they, IMHO, don't even come close to what I see in Arnis. There are grappling defenses, but again, they don't touch what I see in BJJ. We're talking about arts that touch on punching, kicking, kata, various SD, etc., vs an art that focuses on a given area. Sure, Arnis has punch and kick defense, but its a weapon based art, that is the primary focus.
As far as other arts from other countries....I'm sure Silat has good weapon work, but if there are no Silat schools in my area, I don't have anything to base my opinion on, and I'm not going to rely on youtube to form an opinion of something. So, if there are numerous FMA schools vs. having no Silat, Systema, etc. schools around, that is what I base my opinion on. Perhaps if I saw some of the other schools, it may change my mind but until then, I have to go with what I see and am most familiar with.