Oh god... What exactly are you trying to make? Show some dedication, and be more mature please.

I will tell you this:
Your sniper rifles fail because the mass of the shot is too high, and its velocity was too high, lower both <a lot> and it'll be almost safely usable.

What were you thinking when you made the miniguns? It feels like I'm using the same minigun from the vanilla content!

If you can't sprite, learn to sprite, can you draw? If you can draw then you can sprite. If you can't draw learn to draw.

Ask questions in Mod Making.