no the weight gain is very little the co2 tank is lk less then 3 pounds the parts are very little amount and if i really did my homework i could figure out how to use the little ones that are used for pellet guns i just don't know enough about the co2 tanks so i found the ten dollar one that is refillable and i know i can find a valve for it and just unscrew the valve before i race even if i get maybe 5hp out of it still overrides the less then 3 pounds i added to it