Here are just about all of the water guns, and lightsabers that are out there in the stores:

MAX-D 2000:

MAX-D 3000:

MAX-D 4000:

MAX-D 5000:

MAX-D 6000:

MAX-D Secret Strike:

EES Turbine:

EES Sonic:

EES Tempest:

Super Soaker XP 310:

CPS 1-3-5:

CPS 2100:

CPS 4100:

CPS Splashzooka:

Monster X: 

Monster XL:

Lightsabers, non-electronic:

Red

Blue

Purple

Blue

Green

Green

All of the lightsaber blades go into the handle fully, like this one:

Electronic lightsabers:

Also available in green, an purple

Obi-Wan-Kenobi's electronic lightsaber. 

Count Dooku's electronic lightsaber