3 manufactures for ammo, hornady,cci,remington.
Guns are made many manufactures Marlin (i own the vs and love it), savage,ruger,tauras and smith and wesson make pistols as well as heritage firearms. Remington makes a rifle and CZ and Volquartson do as well. The 17 hummer (hmr) was widely accepted when it first came out and is a commercial success. More and more people are buying hummers all the time.