Wow! Stop your grinnin' and drop your linen!
I too have wanted a pulse rifle since I saw Aliens
(upon its initial cinema release all the way back in the mid 80s when I was a kid). We tried to make them out of cardboard - without much success...
And such a great price, too. You American folks don't know how good you have it: it would be IMPOSSIBLE trying to get that through Australian Customs.