Otherwise anyone could run around with it and spray down everything.
Hence my suggestion of a significantly reduced movement speed.
You're too vulnerable while spamming M1 to shield quickly, and you're not fast enough to outrun gremlins, jellies etc.

As for the problem of stationary targets; well, it isn't a problem. You won't be fast enough to dodge incoming projectiles from Puppies, or to avoid Lumbers/Trojans quickly enough.

Sure, the weapon is spammable, but now it comes at a cost - a much greater degree of risk.
That being said though, this still isn't a valid reason for bumping up the damage way too much; it's still a gun by nature.

well i thought ithe mist spray would look like the mist bomb, but more floating like and refined.
Don't forget that since you are using a spray weapon, you're probably going to use quite a lot of projectiles.
That being said, you also need to have a separate counter to keep track of how long the enemy has come into contact with the flame/mist.

Unless you want a single mist projectile to appear once every second (which looks very ugly, imo) you're going to use quite a lot of particle effects which will lag up the entire game.

i believe thats called a volcanic pepperbox?

@Bisento:
What about a rapid fire gun like the Blitz Needle?
No, each projectile is pretty much as it is during the entire duration of the flight.
Chances are the flamethrower projectile will have to change in shape throughout its flight (as real mist/flame does), and quite a fair few will be spawned at once.

Otherwise, static projectiles (a la the Blitz Needle). Not very aesthetically pleasing, but it gets the job done.

and your telling me that 4 sprayers (whats the possiblility of that happening?) going off with all of that would crash a computer or 2, FAT CHANCE.
Crashing a computer is a little too extreme. I'd say reduce its performance by a fair bit.
Have you ever played any levels with Shadow Fire?
Seriously, it's not very fun when you have to render each block one by one as you approach them.

well i thought ithe mist spray would look like the mist bomb, but more floating like and refined.
Again, the graphics quality is always an issue. If you're suggesting that the mist is more 'refined', you'll want better graphics in each projectile.

Mind you, the Blitz projectile exists as a single, static entity until impact, so that argument is irrelevant.
What you're suggesting is akin to firing about 10 shadow fire blocks a second that fade after a few seconds. Not fun.

Don't get me wrong though, it's a decent idea if not for the fact that it might be tricky to implement.

the idea semes legite very small errors but legite