<prompt> Presence of spiral grooves in the barrel of w eapon is referred to as -RiflingIncendiaryCockingNone of the above  <response>: Ans. is a Le., Rifling Type of firearm weaponso Bore caliber is the inner diameter of barrel. Based on inside of barrel i.e., bore, the firearm weapons are divided into:-Smooth bore weapons : Barrel or bore is smooth inside, e.g., shot gun, muskets, and muzzle loaders.Rifled weapons : Barrel or bore is rifled from inside, i.e., has longitudinally twised grooves. Example are : Pistals, rifles and revolvers.o Pistals and revolvers are small, so referred to as hand guns. 