I always did like the phaser pistol from the new Star Trek movie. Especially pleased that only have two settings. Stun and kill. You do a fine job of designing the weapon. I wonder what the phaser rifle is going to be like.
blue is stun, red is kill. I'd guess that the blue tip is a focusing mechanism whereas the red is an amplification mechanism. That way, you could still dial in the power setting on the top, without being concerned about going from heavy stun to kill without noticing.