So, I have a Yamaha RGX-A2 given to me as a gift.

From the looks of it, this guitar doesn't have a whammy/tremolo bar/arm on it.

Question is, can I take it to my local music store and get the guitar-savvy people there to install a whammy/tremolo bar/arm on it?

Can whammy/tremolo bars/arms be installed on just about any guitar just like that? *clicks fingers*