Muzzle flash suppressor

A firearm muzzle flash suppressor comprising a generally cylindrical body member with a proximal end for attachment to a firearm barrel having a rifled bore and a distal end for exit of a projectile from the body member, a recessed portion at the proximal end adapted to receive the firearm barrel, an axial passageway having a diameter slightly greater than the firearm bore connecting the recessed portion to an exit chamber of diameter substantially greater than the firearm bore, said exit chamber including a plurality of helical angled flutes angled in the direction of rifling of the firearm bore and being open at the distal end of the body member, and a means for attaching the body member to the firearm barrel.