Can you shoot a gun underwater and What happens ?
Shooting a gun underwater is not as simple as it sounds. In fact, there are a few things you need to take into account before doing so. For example, the bullet will not travel very far and it is possible for the gun to explode if it is not properly sealed. So, while you can technically shoot a gun underwater, it’s probably not worth the hassle.
Let’s take a closer look at what happens when you shoot a gun underwater figure it out together with the yankee shooter firearm network.
Can you do this ?
Yes, you can shoot a gun underwater but the bullet will not travel very far, when you shoot gun, the gun still goes off just as it does on land but the Bullet goes much slower

Physics explained
That’s because water is 800 times denser than air (AIR:0.08 LBS/FT3) WATER: 62 LBS/FT3) so the bullet is pushing against a lot more resistance . when you do the math, it show that water’s drag force (Fd) is about 800 times greater than air’s Fd. So if a 1,000-grain bullet traveling at 2,000 fps on land will drop about 3 inches over 100 yards.


Once the Bullet hits the water, it immediately begins slowing down High Pressure pushes the bullet out of the gun yet there’s extremely Low Pressure behind the bullet, this partial vacuum can build the water in slow-motion, you wold see bubbles exploding in the path of the bullet.
Conclusion

Bullet can travel miles when fired in the air but underwater, they’ll probably only go several feet and It is also possible for the gun to explode if it is not properly sealed, so it is important to be careful when shooting a gun underwater So… don’t try this at home.
FAQ
What types of guns can be safely fired underwater?
Guns that use air pressure to fire a projectile can be safely fired underwater. This includes BB guns, pellet guns, and paintball guns. Guns that use an explosive propellant are not safe to fire underwater.
What situations can underwater gun shooting be used?
Underwater gun shooting can be used in a variety of situations, including:
-In law enforcement, to shoot out windows or break through barriers in order to apprehend suspects
-In the military, as a way to destroy enemies or their equipment from underwater
-As part of a training exercise, to help officers and soldiers learn how to shoot under pressure and in difficult environments
-For recreational purposes, such as hunting fish or sharks, So underwater gun shooting can be used to hunt marine life such as fish, turtles, and crocodiles. By using a gun that is specifically designed for use underwater, hunters are able to more effectively take down their prey.