Rifling the barrel imparts spin to the projectile, which helps to stabilize it and keep it "right end first". Projectiles fired from a smooth-bore weapon are much more subject to tumbling, which doesn't make much difference if the projectile is spherical but makes a very big difference to drag and therefore to range and accuracy if the projectile is NOT spherical.
the musket does not have a rifled barrel and a rifle does
Yes it could be done, but you would have to locate a smooth bore barrel to change it with. Remember smooth bore barrels are not as accurate as a rifled bore barrel.
Yes it is.
A rifle is a firearm designed to be fired from the shooter's shoulder that has a rifled barrel. A rifled barrel contains spiral grooves within its bore that impart a spin to the fired bullet thus causing it to be more stable and fly accurately.
The first gun with a rifled barrel (a rifle is any gun with grooves cut into the barrel to give the projectile spin) used by American forces was the Kentucky rifle, used in the revolutionary war.
There are grooves in a rifle barrel, or external screw-helices on so-called Rifled slugs, which are fired from shotguns, but are externally rifled for spin stabilization?
Springfield is the manufacturer. A rifle is a long arm with a rifled barrel. A carbine is a short rifle, generally considered having a barrel length of 20 inches or less. All carbines are rifles but not all rifles are carbines.
The bore is rifled so as to put a spin on the bullet. This spinning gives a greater accuracy to the bullet, especially over that of a smooth bore.
I am fairly certain it is the rifled part of the barrel, not including the chamber, from the headspace ledge to the muzzle, and including any permanant non-rifled attachments to the muzzle. Therefore, a rifle with a fifteen inch barrel can be legal if it has a muzzle brake or compensator which brings its length to over sixteen inches.
Neither barrel is rifled.
Not safely
You look down the barrel and if it is swirled it is a rifled barrel and if it is not swirled it is a smooth bore