User blog comment:TheBiggerTicket/Design your own ME3 weapon!/@comment-5267262-20120831193446

I already thought of a couple, no harm in posting them here as well

Oltan resonant impact SMG -Type: SMG -Clip: 50/100 -Power: miniscule + (see special) -Firerate: med-high automatic -Special each shot does a bit of bonus damage that is proportional to the amount of damage that the target has taken from any Oltan SMGs in its lifetime making damage per shot rise almost exponentially.

M-86 Railgun Sharpshooter Rifle -Type: Sniper Rifle -Clip: 100/- (see special) -Power: (see special) -Fire rate: Semiautomatic (see special) -Special: each time a shot is fired the magazine empties completely (goes to 0 no matter what it was on before the shot). The magazine then regenerates itself quite slowly but starting almost immediately. Base penetration, recoil and slight delay before the magazine starts to replenish are all proportional to the number in the magazine when fired. (Damage is proportional to the square of the magazine number to give a higher DPS if you wait a while between shots)