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Number 1. spiral ridges in the barrel of the gun

Correct Answer: rifling

Number 2. long tube that the bullet travels through before exiting the firearm

Correct Answer: barrel

Number 3. initiates the firing of the bullet

Correct Answer: firing pin

Number 4. projectile, propellant, primer, surrounded by a casing

Correct Answer: cartridge

Number 5. cartridge without a projectile

Correct Answer: blank

Number 6. produces the spark to ignite the gunpowder

Correct Answer: primer

Number 7. measurement used to determine the caliber

Correct Answer: diameter

Number 9. tiny, microscopic scratches on the surface of a bullet

Correct Answer: striations

Number 10. Number of lands (raised areas) or grooves in a riffled barrel

Correct Answer: rifling number