Here is a helpful list of the weapons and how powerful they really are:

Machine Gun - Damage: 1-5
Fire Missile - Damage: 8
Homing Missile - Damage: 5
Power Missile - Damage: 20
Gas Can - Damage: 11
Ricochet Bomb - Damage: 9
Environmental Hazard - Damage: Special
Skill Reticle - Damage: 7-70
Skill Satellite - Damage: 7-70
Skill Zoomie - Damage: 2-20
Freeze Missile - Damage: 1
Mine - Damage: 10
Charge-up Mine - Damage: 20