When was the pistol invented?
The first weapon that worked like a pistol was the matchlock arm, used by Spanish armies in the late 15th Century. Wheel locks were then invented and the weapon was in common use by French armies by 1544. In 1836 the revolving pistol (revolver) as it now exists was patented by Samuel Colt of Connecticut.
the 30 cal. carbine was introduced to WW2 to replace the 45 cal. pistol In addition the PPSh 43 machine pistol (Soviet) M3 Machine Pistol (Grease Gun) (USA) Sten Machine Pistol (UK) MP44 Assualt Rifle (The AK-47 was largely copied from this weapon) (Germany) Johnson semi automatic Rifle (USA) Reisling machine pistol (USA) ....and quite a few more