If I have a laser pointer gun because it has no fire under its name, will it be regulated? Well, your laser is not a "firearm" and will not fire projectiles, so you will be in a gray area. It will not meet the ATF's definition of a gun, more because there is no projectile rather than no fire. It will not satisfy most state gun laws.
Some states have enacted laws concerning "electric weapons" such as taser guns. If you carry a laser pistol with you, you may conflict with these laws. There are regulations regarding laser power, so you may be in a strange place. If one showed a laser weapon (such as sci-fi stuff) that is currently superior to most traditional guns, and was able to verify its authenticity without showing how it works, what would be the global reaction?
Various armies will begin to phase out modern guns that use various types of ammunition. In addition, this will be the next step in the use of laser-based weapons in the military. And it is very likely that the army will be more advanced than it is today. I am tired of lasers. Can you think of an original sci-fi weapon with physically possible effects? First, the new weapon must have an advantage over the old weapon. The laser is faster, and there may be more ammunition.
In Star Wars, blasting guns are guns that use electromagnetic transmitters to emit plasma "the next stage after gas", so electromagnetic shielding can prevent them and cause burning. The plasma can be kept in a shape, so it is a lightsaber.
The problem is that you are talking about originality. What about resonators that generate resonance frequencies in specific parts of the body, such as neurons green laser pointer. The target’s brain shakes itself or spinal fluid paralyzes the target, but still keeps them alive, forcing other soldiers to take care of the wounded