Is This A Home.M Or A Mod?

So I have a really quick question. Does it still qualify as a mod if only the handle and airtank are used, but, say, theres a long arm sticking out of the blaster?

Ex: Say theres a strongarm with a piece of pvc sticking out the front with an airtank slapped on the front of the pipe, with all the orginal strongarm internals removed completely?

(Planning for the mod contest(hey where is the offical upload post for that?))

Edit: Grammar.