i believe they are katyusha rockets, which were invented in ww2 so we are talking top of the line cutting edge technology here.
here is some info:
www.globalsecurity.org...
Originally posted by Harlequin
they are using Qassam rockets
www.aerospaceweb.org...
60mm in diameter 160 cm in length , weighs about 6kgs , has a range of about 5km`s and made on gaza strip or the west bank iteself - they are not imported as its cheaper and easier to make themselves.