"Mass produced" and "specialized" are not exclusive of eachother. Look at naval ship construction. Theyre very large, specialised, and theyre thousands floating around.
The fact we're forced to use I-beams for space ship construction is silly anyway.
Typically ships are classified based on size and role. Though it may have less capable weapons, it has a lot, making it quite a bit larger than the current "fighter." This suggests to me that its a gunship... Which is its current classification.