Collect the corresponding amount of components to be able to upgrade to the new ray gun options. The first option is the straight shot, and the second option is the special shot.

Unlock Ray Gun/Spread Shot Lvl 1:
Collect 20 components.

Unlock Plasma Ball Lvl 1/Spread Shot Lvl 2:
Collect 100 components

Unlock Plasma Ball Lvl 2/Plasma Artillery Lvl 1:
Collect 200 components

Unlock Hyper Plasma Ball Lvl 1/Plasma Artillery Lvl 2:
Collect 300 components

Unlock Hyper Plasma Ball Lvl 2/Shock Wave Lvl 1:
Collect 400 components

Unlock Rocket Launcher Lvl 1/Shock Wave Lvl 2:
Collect 500 components

Unlock Rocket Launcher Lvl 2/ Heat Seekers:
Collect 600 components