There are several different definitions of "Small Arms" and Light Weapons" out there, but I choose to use the one listed in the following UN report:
Page 11, #26:
http://www.smallarmsnet.org/docs/saun13.pdf
Small Arms:- revolvers and self loading pistols
- rifles and carbines
- assault rifles
- sub machine guns
- light machine guns¨
Light Weapons:- heavy machine guns
- hand-held under-barrel and mounted grenade launchers
- portable anti-tank and anti-aircraft guns
- recoilless rifles
- portable launchers of anti-tank and anti-aircraft missiles
- mortars of calibres less than 100mm
This part of the forum is for hardware related discussions only, gun control and related discussions should go in the political discussions forum.