Suppressors can reduce muzzle flash, and in some cases, they can eliminate it. There are a few factors that contribute to how effective a suppressor is at reducing muzzle flash, including the length of the suppressor and the type of firearm it’s being used on. Suppressors work by trapping the expanding gases that are released when a bullet is fired and allowing them to cool before they exit the muzzle. This process significantly reduces the temperature of the gases, which in turn reduces or eliminates the visible light that we see as muzzle flash.
So if you’re looking for a way to reduce muzzle flash, using a suppressor is one option to consider. Just keep in mind that suppressors can also slightly reduce the velocity of your bullet, so it’s important to choose one that’s the right length for your particular firearm.