Talk:4 Target Air-to-Air Missile/@comment-3436482-20160528053802/@comment-1824272-20160529110059

@Ishimura Elite: Upgrading your special weapons, as you notice, doesn't even result in a letter grade increase in most cases. However, that's the point. If you could upgrade your special weapons to the point where they would actually be 5x as powerful as they were when they were Lv.1, that would be insanely overpowered for those who choose to upgrade them.

Your choice to upgrade them or not is just that - your choice. The return on investment isn't that large, as you said, but they do get slight increases in performance. Keep in mind that the only way to improve special weapon performance, outside of parts, is to upgrade them. Aircraft upgrades do not affect special weapon performance, so a combination of parts and special weapon upgrades are required to improve their performance.

tl;dr It's pricey but it's your decision on whether to do so or not. It does allow for some performance increases.