Answer:
Barrel
Step-by-step explanation:
Barrel
It is the part of the gun ,
Barrel is a long tube made up of metal , in which the bullet or the projectile goes after the firing is done .
Guns can have a variety of sizes of barrels .
longer barrel means , the bullet will hit the target more frequent .
Barrels have some grooves , in the spiral form , in the rifling .
Barrels which have grooves spin the projectile faster after exiting the gun .
Thereby making the projectile more accurate and stable .