The answer depends on what "best" means to you.
The Savage Arms Company is an American manufacturer of firearms. One can purchase Savage firearms accessories directly from the manufacturer's website.
japan
Ruger
Probably.
Glock. They are the manufacturer of firearms with their name.
Firearms manufacturer in Lancaster, Pennsylvania, c. 1910-1920.
Between 1894 and 1930.
A manufacturer and distributor of firearms located in NC, they closed in 1999.
Nope. They were an importer, not a manufacturer, and went out of business in 1996.
pt (patent) fa (firearms) mfg (manufacturer)
FIE was an importer - not a manufacturer - which filed bankruptcy in 1990. Firearms they imported can still turn up (used) from time to time.
Ingram (a firearms manufacturer best known for the MAC-10 and MAC-11)