1) Armorer 1) Arms maker 2) Barrel maker 3) Beretta mender 4) Colt fixer 5) Colt handler 6) Piece maker 7) Repairer of weapons 8) Smith 
A gunsmith is a person who repairs, modifies, designs, or builds guns. This occupation differs from an armorer. A gunsmith does factory level repairs, renovation (such as applying metal finishes), and makes modifications and alterations for special uses. Gunsmiths may also apply carvings, engravings and other decorative features to an otherwise fi...
• (n.) One whose occupation is to make or repair small firearms; an armorer.
Gun'smith noun One whose occupation is to make or repair small firearms; an armorer. 
[n] - someone who makes or repairs guns
a person who makes or repairs firearms.