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Serak is a "Pukulan" (word primarily used by Dutch/Indonesians) system
Yes in Asia this word isn't usually used to decribe silat systems (at least the masters I met, told me every silat system has striking ie pukulan ). Filipino Silat Asli has different components, is rather all rounded and has an associated escrima style... at a higher level it specializes in catching-traping-locking.
There are many weapons knives, swords, staves, spears, ropes and different flexibles weapons, projectiles.